PLEASE HELP WITH 1 OR TWO!!!

The appropriate null and alternative hypothesis for calculating number of gogles is H0 : No linear relation H1 : there is a relation

Correlation is a statistical measure that expresses the extent to which two variables are linearly related (meaning they change together at a constant rate).

It's a common tool for describing simple relationships without making a statement about cause and effect.

According to the question,

A group of scientist randomly selected 20 piknits from the sea-floor and measured their respective weights in grams.

Also, They wanted to know if the weight of the piknits can be used to predict the number of gogles.

From the given information,

Null hypothesis : H0 : There is no linear relationship between the weight of piknits and the number of gogles

Alternative hypothesis : Ha: There is a linear relationship between the weight of piknits and the number of gogles

Option 4 is correct about null and alternative hypothesis

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Answer:

x= 26°

Step-by-step explanation:

it's a 90 degree angle as a whole so just subtract 64° from 90° to get the other angle.

Answer:

x=26

A line is 180 degrees

the square at the bottom left means 90 degrees

90+64=154

180-154=26 degrees

The number of possible ways in which Juan can pick exactly one purple counter from Box A and Box B is 3.

Given,

      We know that,   Box A contains only green and purple counters.

       We also know that,   Box B contains only green, purple, and orange counters.

According to question ,

Juan picked one counter from Box A and one counter from Box B

Possible ways to pick exactly one purple counter :

Box A                                       Box B

one purple counter       one orange counter

one purple counter       one green counter

one green counter        one purple counter

Hence, there are 3 ways in which Juan can pick exactly one purple counter.

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184 people

groups of 13

How many vans needed to take the people to the hotel.

\( \frac{184}{13} \)

\( = 14.1538461538\)

\(nearest \: whole \: number = 14\)

therefore, they'll need 14 vans to take the people to the hotel.

answer= option B

Answer:

7020

Step-by-step explanation:

2÷390,702,468

2÷195,351,234

3÷

The dimensions of a horizontal cross-section will vary depending on the specific shape or object being considered.

To determine the dimensions of a horizontal cross-section, we need more specific information about the object or shape in question.

A horizontal cross-section refers to a slice or cut made parallel to the horizontal plane.

The dimensions of a horizontal cross-section will depend on the shape or object being sliced. For example, if we have a rectangular prism, a horizontal cross-section would result in a rectangle.

The dimensions of this rectangle would be equal to the dimensions of the corresponding face of the prism.

If we have a cylindrical object, a horizontal cross-section would result in a circle. The dimensions of this circle would be determined by the radius or diameter of the cylinder.

It is essential to provide more information about the shape or object to determine its corresponding horizontal cross-section dimensions.

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To determine whether the series ∑(n=1 to infinity) 7n/n is convergent or divergent, we can apply the ratio test. The ratio test helps us determine the convergence or divergence of a series by examining the limit of the ratio of consecutive terms.

In this case, let's calculate the ratio of consecutive terms using the formula for the ratio test:

lim(n→∞) |(7(n+1)/(n+1))/((7n/n)|

Simplifying the expression, we get:

lim(n→∞) |7(n+1)/n|

As n approaches infinity, the limit evaluates to:

lim(n→∞) |7(n+1)/n| = 7

Since the limit is a finite positive value (7), which is less than 1, the ratio test tells us that the series is convergent.

However, you mentioned identifying an (term) in the series, and it seems there may be an incomplete part of the question. Please provide additional information or clarification about identifying an term in the series so that I can provide a more specific answer.

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Answer:

The answer is 4.06155281

Step-by-step explanation:

1.the standard deviation of the sampling distribution of is 0.045. Hence, option D is correct.

The standard deviation of the sampling distribution of is About 0.28, but not exactly 0.28The question mentions that 28% of the households own blu-ray players. A simple random sample of 100 households is to be contacted and the sample proportion computed. Therefore, the sample size (n) = 100Therefore, the population proportion (p) = 0.28Therefore, the population standard deviation (σ) is given by:σ = √[p(1-p)/n]σ = √[(0.28 x 0.72) / 100]σ = 0.0456 ≈ 0.045Therefore, the standard deviation of the sampling distribution of is 0.045. Hence, option D is correct.

2. The distribution of values taken by a statistic in all possible samples of the same size from the same population is called Sampling Distribution. This distribution is important in statistics because it allows us to calculate the probability of different sample statistics occurring. The central limit theorem states that the sampling distribution of the sample mean approaches a normal distribution as the sample size gets larger.

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Answer:

y = 3x - 5

Step-by-step explanation:

3x-y=5

-3x     -3x

-y= -3x + 5

divide each number by -1

-y/-1 = y

-3x/-1 = 3x

5/-1 = -5

The equation 3x - y = 5 can be converted to slope-intercept form as follows: y = 3x - 5

Given is an equation 3x - y = 5, we need to convert it in slope-intercept form.

To convert the equation 3x - y = 5 into slope-intercept form (y = mx + b), where "m" represents the slope and "b" represents the y-intercept, we need to isolate the variable "y" on one side of the equation.

Let's rearrange the given equation step by step:

Starting with 3x - y = 5, we can begin by moving the term involving "x" to the other side:

3x - y + y = 5 + y

Simplifying:

3x = y + 5

Now, let's isolate "y" by subtracting "y" from both sides:

3x - y = y + 5 - y

Simplifying:

3x - y = 5

To eliminate the "y" term on the left side, we can add "y" to both sides:

3x - y + y = 5 + y

Simplifying:

3x = 5 + y

Next, let's rearrange the equation to have "y" on the right side:

3x = y + 5

We can write this equation as:

y = 3x - 5

Now the equation is in slope-intercept form (y = mx + b), where the slope "m" is 3, and the y-intercept "b" is -5.

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The population decreased by 5,400 people from 2015 to 2020.

Also known as population decline, means the reduction in a human population size

Population in 2015 = Population in 2010 + Growth from 2010 to 2015

Population in 2015 = 167,000 + (8% of 167,000)

Population in 2015 = 167,000 + 13,360

Population in 2015 = 180,360

Population in 2020 = Population in 2015 - Decrease from 2015 to 2020

Population in 2020 = 180,360 - (3% of 180,360)

Population in 2020 = 180,360 - 5,411.8

Population in 2020 = 174,948.2

The population decrease from 2015 to 2020 is:

= Population in 2015 - Population in 2020

= 180,360 - 174,948.2

= 5,411.8

= 5,400 to nearest 100 people.

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Answer:

7

Step-by-step explanation:

Try taking everything besides the x away. So the opposite of positive 7 is negative seven on the opposite side. 21-7 is 14 and 2x=14 is all that remains. The opposite of 2 times x is 2 divided by x and since we want to keep the x we divide the 2 on the other side, 14/2 is 7. x=7 is what remains.

Let the speed of the train be v km/hr and its length be l meters. The first car is moving at 45 km/hr while the second car is moving at 50 km/hr. Therefore, the speed of the train relative to the first car = (v - 45) km/hr. Similarly, the speed of the train relative to the second car = (v - 50) km/hr.

Using the formula distance = speed × time, we can calculate the distances covered by the train in passing each car. For the first car, the distance covered is l and the time taken is 36 seconds. Therefore, distance = speed × time gives us l = (v - 45) × (36/3600) km. For the second car, the distance covered is l and the time taken is 54 seconds. Therefore, distance = speed × time gives us l = (v - 50) × (54/3600) km.

Equating both these expressions for l, we get:(v - 45) × (36/3600) = (v - 50) × (54/3600)Simplifying this expression, we get v = 75 km/hr. Now we can substitute this value of v into either of the expressions for l that we derived earlier and get the length of the train. Using the first expression, we get: l = (v - 45) × (36/3600) km= (75 - 45) × (36/3600) km= 0.4 km= 400 meters Therefore, the length of the train is 400 meters. The length of the train is 400 meters. To solve this question, we first need to understand that the train passes two cars that are moving at different speeds. Using the relative speeds of the train and each car, we can set up two equations for the distances covered by the train in passing each car. Equating these expressions for the distances, we can solve for the speed of the train. Finally, substituting this value of the speed into one of the expressions for the distance covered by the train, we can find the length of the train.

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The authors of the article "A Distance-Based Diagnostic for Transdimensional Markov Chains" are Sisson, S. A. and Fan, Y. (2007). This article was published in the journal Statistics and Computing, volume 17, issue number 4, on pages 357-367.

The article proposes a diagnostic tool for detecting when transdimensional Markov chain Monte Carlo algorithms are not sampling the target distribution correctly. This tool is based on measuring the distance between the empirical distribution of the samples generated by the algorithm and the target distribution. The authors show that this distance measure can be used to identify situations where the algorithm is not mixing well and propose a threshold value for this distance that can be used to decide when to stop the algorithm.

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The change in profit (ΔP) when the number of units (Δx) increases by 5, based on the given marginal profit function, is -18331.50

To find the change in profit (ΔP) when the number of units (Δx) increases by 5.

we need to evaluate the marginal profit function and multiply it by Δx.

The marginal profit function is given by dP/dx = 12.1(60 - 3x).

We are given the value of x as 121, so we can substitute it into the marginal profit function to find the marginal profit at that point.

dP/dx = 12.1(60 - 3(121))

= 12.1(60 - 363)

= 12.1(-303)

= -3666.3

Now, we can calculate the change in profit (ΔP) by multiplying the marginal profit by Δx, which is 5 in this case.

ΔP = dP/dx×Δx

= -3666.3 × 5

= -18331.5

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a. The table value of z 0.99 is given as 2.58.

b. we use σ = 2.30 minutes.

c. The value of Z is given as 0.609.

d. The confidence interval is (23.391, 24.609) minutes.

a) To find the z-score for a 0.99 confidence interval, we need to find the z-score that leaves 0.5% (since it's two-tailed, we split the 1% or 0.01 of the data that's not within the confidence interval into two) in each tail. The z-score for 0.995 (0.5% in the upper tail) is approximately 2.58 in standard normal distribution tables. So, Z_0.99 is 2.58.

b) Therefore, we use σ = 2.30 minutes.

c) The standard error of the mean (SE) is given by σ/√n, where n is the sample size.

Here, σ = 2.30 minutes and n = 95.

Therefore, SE = σ/√n

= 2.30/√95

= 0.236 minutes.

Multiply this by the z-score to find Z * σ/√n.

Therefore, Z * σ/√n = 2.58 * 0.236 ≈ 0.609.

d) The 0.99 confidence interval for μ

Here, x is the sample mean which is 24 minutes.

So the confidence interval is approximately

= (24 - 0.609, 24 + 0.609)  

= (23.391, 24.609) minutes.

This is the range of values we are 99% confident that the true population mean (μ) falls in.

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Answer:

Carlos is having a party he has every thing he needs exept ice. He goes to a store where they sell mini ice bags, each bag has 16 ice cubes in it and costs 1$. How many bags will he need if he needs 96 peices of ice?

Step-by-step explanation:

hope it helps have a blessed day

Answer: Gamma rays

Step-by-step explanation: Gamma rays have the highest energies and shortest wavelengths on the electromagnetic spectrum.

To set up this confidence interval, first identify the population parameter of interest, next select the appropriate estimator, then check the conditions for constructing the confidence interval that are: Randomization, Sample size and Distribution shape.

State:
Zachary wants to estimate the mean number of daily texts he sent over the past four years using a 90% confidence interval. He has an SRS of 50 days, with a daily average of 22.5 messages. The data is strongly skewed to the right with many outliers.

Plan:
1. Identify the population parameter of interest: The mean number of daily texts sent by Zachary over the past four years (µ).
2. Select the appropriate estimator: In this case, it's the sample mean = 22.5 messages.
3. Check the conditions for constructing the confidence interval:
  a. Randomization: Zachary used a simple random sample (SRS) of 50 days, which satisfies the randomization condition.
  b. Sample size: The sample size is n = 50, which is typically considered large enough for constructing a confidence interval.
  c. Distribution shape: Since the data is strongly skewed to the right with many outliers, the normality condition might not be satisfied. In this case, the Central Limit Theorem (CLT) may not apply, and the confidence interval might not be accurate.

Given the potential issue with the distribution shape, Zachary should consider either transforming the data to approximate normality or using a nonparametric method.

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In this triangle, the product of tan A and tan C is `(BC)^2/(AB)^2`.

The given triangle ABC has angle A measuring 45 degrees, angle B measuring 90 degrees, and angle C measuring 45 degrees , Answer: `(BC)^2/(AB)^2`.

We have to find the product of tan A and tan C.

In triangle ABC, tan A and tan C are equal as the opposite and adjacent sides of angles A and C are the same.

So, we have, tan A = tan C

Therefore, the product of tan A and tan C will be equal to (tan A)^2 or (tan C)^2.

Using the formula of tan: tan A = opposite/adjacent=BC/A Band, tan C = opposite/adjacent=AB/BC.

Thus, tan A = BC/AB tan C = AB/BC Taking the ratio of these two equations, we have: tan A/tan C = BC/AB ÷ AB/BC Tan A * tan C = BC^2/AB^2So, the product of tan A and tan C is equal to `(BC)^2/(AB)^2`.

Answer: `(BC)^2/(AB)^2`.

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The irreversible loss of an island from over 100 acres in size to less than 3 acres is an example of the irreversible nature of human change.

Human activity has lead to the change of Earth's climate in unimaginable ways over the last thousand years. Some of these changes are so significant that they are practically inevitable and irreversible.

Due to global warming, the planet's temperature is increasing gradually every year. This change in climate causes polar ice caps to melt and increases the water level.

Islands, which are pieces of land in between water bodies, are reducing in size due to this. The increased water level submerges some or all parts of an island. This is especially threatening for small islands.

This is not only dangerous for the human and wildlife population of these islands, but also for the general habitability. Due to frequent flooding, soil salinity increases and this makes it difficult to cultivate these islands.

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Answer: 3:1

Step-by-step explanation:

Since the jewellery shops sell 240 necklaces in a month and 180 of the necklaces were sold via the shop's website, this means that (240 - 180) = 60 necklaces were sold in a high street shop.

Therefore, the ratio of online sales to shop sales will be:

= 180 / 60

= 3 / 1

= 3:1

Answer:

Step-by-step explanation:

area of side face=(37+15)/2 ×25.7=26×25.7 cm²

volume=26×25.7×20=13364 cm³

The variable  a. model of automobile is Qualitative b. flavor of ice cream is Qualitative c. religious denomination is Qualitative d. test score out of 100 is Quantitative e. miles per gallon of gasoline is  Quantitative f. top three television networks is Qualitative g. length of birth contraction in seconds is Quantitative.

The Quantitative variable is defined as the variable which takes numerical value. for eg. 2mph, 90 , 34m.

The Qualitative variable is defined as the variable which takes values such as name/label etc. for eg, john , smith , Toyota ,vanilla.

According to the question

        VARIABLE                           CATEGORY              CLASSIFIED              

a. model of automobile               Qualitative         on the basis of name

b. flavor of ice cream                   Qualitative         on the basis of name

c. religious denomination            Qualitative         on the basis of name

d. test score out of 100               Quantitative        on the basis of number

e. miles per gallon of gasoline   Quantitative        on the basis of number

f. top three television networks  Qualitative          on the basis of name.

g. length of birth contraction      Quantitative        on the basis of number.

  (in seconds)  

Therefore , The variable  a. model of automobile is Qualitative

b. flavor of ice cream is Qualitative

c. religious denomination is Qualitative

d. test score out of 100 is Quantitative

e. miles per gallon of gasoline is  Quantitative

f. top three television networks is Qualitative

g. length of birth contraction in seconds is Quantitative

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Solution:

Given:

The domain of a function is the set of input values for which the function is defined.

The function will be undefined when the denominator is 0.

Hence, we test for singularity or undefined points.

Thus, the domain will exist at all other values except the singularity or undefined point.

Hence, the domain is;

Thus, the final answer is;

OPTION D is correct

Answer:

23

Step-by-step explanation:

3z + 2(z-1)

Let z=5

3*5 +2( 5-1)

15 +2(4)

15+8

23