A large number of insurance records are to be examined to develop a model for predicting fraudulent claims. of the claims in the historical database, 1% was judged to be fraudulent (class 1).a sample database is taken to develop a model, and oversampling is used to provide a balanced sample in light of the very low response rate. when applied to this sample database (total number of records, n = 800), the model ends up correctly classifying 310 frauds, and 270 non-frauds. it misses 90 frauds and classified 130 records incorrectly as frauds when they were not.if the positive sample number is fixed (400), the sample ratio is 1:99 (fraudulent vs. non-fraudulent, positive vs. negative)1. what is the adjusted misclassification rate (error rate) that should be in the original non-oversampled database?2. what is the total number of false positive records that should be in the original non-oversampled database?

We need a minimum sample size of 336 to estimate the population proportion of U.S. adults who eat fast food four to six times per week with a 90% confidence level.

A) When there is no preliminary estimate available, we can use the worst-case scenario, which is p = 0.5 (since this gives the maximum possible variability). The margin of error is given as 3% or 0.03. The formula to calculate the minimum sample size needed is:

n = [Z² x p x (1 - p)] / E²

where Z is the z-value for the desired confidence level, p is the population proportion, and E is the margin of error.

At 90% confidence, the z-value is 1.645. Plugging in the values, we get:

n = [(1.645)² x 0.5 x (1 - 0.5)] / (0.03)²

n ≈ 1217.75

We need a minimum sample size of 1218 to estimate the population proportion of U.S. adults who eat fast food four to six times per week with a 90% confidence level and an accuracy of 3%.

B) If a proper study found that 11% of U.S. adults eat fast food four to six times per week, we can use this as a preliminary estimate and calculate the minimum sample size needed with the formula:

n = [Z² x p x (1 - p)] / E²

where p is the preliminary estimate of the population proportion (0.11), and the other variables are the same as before.

At 90% confidence, the z-value is 1.645. Plugging in the values, we get:

n = [(1.645)² x 0.11 x (1 - 0.11)] / (0.03)²

n ≈ 335.77

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Answer:

9-16y

Step-by-step explanation:

9-x^2y when x=4

plus in 4: 9- (4)^2y

=9-16y

Answer:

angle one

Step-by-step explanation:

Answer:

1 feet/3 inches

(i) Number of significant figures: (i) 12300: 3 (ii) 0.0301: 3 (iii) 3.5070: 5 (iv) 7.50×10⁻⁴: 3 (v) 7.50×10⁴: 3 (ii) Expressions with significant figures:

(i)\($11.0 + 1.10 = 12.1$\) (3 significant figures) (ii) \($11.0 - 1.10 = 9.90$\) (3 significant figures) (iii) \($11.0 \times 1.10 = 12.1$\) (3 significant figures) (iv) \($11.0 \div 1.10 = 10.0$\) (3 significant figures) (v) \($11 + 2 \times 10^{-21.8} \div 2 = 11$\) (3 significant figures)

(i) 12300: There are 3 significant figures in this number.

(ii) 0.0301: There are 3 significant figures in this number.

(iii) 3.5070: There are 5 significant figures in this number.

(iv) 7.50×10⁻⁴: There are 3 significant figures in this number.

(v) 7.50×10⁴: There are 3 significant figures in this number.

(i) 11.0 + 1.10 = 12.1

The answer, 12.1, has 3 significant figures.

(ii) 11.0 - 1.10 = 9.90

The answer, 9.90, has 3 significant figures.

(iii) 11.0 × 1.10 = 12.1

The answer, 12.1, has 3 significant figures.

(iv) 11.0 ÷ 1.10 = 10.0

The answer, 10.0, has 3 significant figures.

(v) \($11 + 2 \times 10^{-21.8} \div 2 = 11$\)

The answer retains the same number of significant figures as the largest value involved in the calculation. Therefore, the answer has 3 significant figures.

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Step-by-step explanation:

where is the steps to this question you can't answer it without a question too it SMH

Answer:

Mike can make 4 bows

Step-by-step explanation:

Given

\(1\ bow = 3\frac{1}{2}\ ft\)

\(Ribbon = 14\ ft\)

Required

Determine the number of bows he can make

To do this, we simply divide the length of the ribbon by length of 1 bow:

i.e.

\(Number = Ribbon/1\ bow\)

\(Number = 14\ ft/3\frac{1}{2}\ ft\)

\(Number = 14/3\frac{1}{2}\)

\(Number = 14/\frac{7}{2}\)

Convert to *

\(Number = 14 * \frac{2}{7}\)

\(Number = \frac{28}{7}\)

\(Number = 4\)

Hence, Mike can make 4 bows

There is a 21.19% chance that the daily production falls within 32.3 and 36.9 liters.

To find the probability that the daily production of a herd of cows is between 32.3 and 36.9 liters, we need to use the normal distribution properties.

Given that the mean daily production of the herd of cows is 30 liters and the standard deviation is 8.2 liters, we can standardize the distribution and use the standard normal distribution table or calculator. We calculate the z-scores for the values 32.3 and 36.9, which tells us how many standard deviations away from the mean each value is.

Using a standard normal cumulative distribution function, we can find that the probability of the daily production falling between 32.3 and 36.9 liters is approximately 0.2119. This means that there is a 21.19% chance that the daily production falls within this range.

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The probability that daily production is between 32.3 and 36.9 liters is 0.18949 or 18.9%.

To determine the probability that the herd's daily production will be between 32.3 and 36.9 liters, we must compute the z-scores for each number and use a standard normal distribution table to calculate the area under the curve between those z-scores.

To find out the z - scores we need use z-score formula:

Z = X−μ / σ

where μ  is the mean, σ is the standard deviation and X is the observed value. In the problem μ  is 30 liters, X₁ = 32.3 liters & X₂ = 36.9 liters and σ = 8.2 liters.

Substituting the values in the equation to find the z-score for 32.3 liters is:

z₁ = (32.3 - 30) / 8.2 = 0.2804

z₁ = 0.28049

Substituting the values in the equation to find the z-score for 36.9 liters is:

z₂ =( 36.9 - 30) / 8.2 =  0.8414

z₂ = 0.8414

We can determine the area under the curve between these two z-scores using a conventional normal distribution table. The area between z = 0.28049 and z = 0.8414 and the probability is approximately 0.1894.

As a result, the probability that the herd's daily output is between 32.3 and 36.9 liters is about 0.1894.

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Answer:

C). The term  needs to be converted so it has a common denominator before adding it to the left side of the equation to balance the equation.

Step-by-step explanation:

Hope this helps! :)

Answer:

b

Step-by-step explanation:

Answer:

The mean is 7.8

Step-by-step explanation:

Add all the numbers up

5+9+7+12+9+12+5+5+9+5=78

Then divide the number you get from adding them all up and divide that number by the total numbers

78 ÷ 10 = 7.8

Hope this helps:)....if not then sorry for wasting your time and may God bless you:)

The equation that represents h(x) is h(x) = (f(x))(g(x)).

To determine which equation represents h(x), we need to analyze the given table and understand the relationship between the functions f(x), g(x), and h(x).

Since h(x) represents the output values obtained by multiplying f(x) and g(x), we should look for values in the table where h(x) is the product of the corresponding values of f(x) and g(x).

Let's examine the table and compare the values:

x | f(x) | g(x) | h(x)

1 | 3 | 4 | 12

2 | 5 | 2 | 10

3 | 2 | 6 | 12

From the table, we can see that the values in the h(x) column are the products of the corresponding values in the f(x) and g(x) columns. Therefore, the equation that represents h(x) is h(x) = (f(x))(g(x)).

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Answer:

It's B.

Step-by-step explanation:

Edge 2020.

Answer:

Samuel : x

wife : y

sum of their age : 2+ x : 10

Answer:

x - y = 42

x + y = 112

--------------

2x = 154, so x = 77 and y = 35

A type of article that provides a quantitative summary of the evidence is a systematic review and meta-analysis.

A systematic review is a comprehensive and rigorous approach to synthesizing existing research literature on a specific topic. It involves a systematic search for relevant studies, an assessment of their quality and relevance, and a synthesis of the findings.

A meta-analysis, on the other hand, is a statistical method that combines the results of multiple studies to generate a quantitative summary of the evidence.

Systematic reviews and meta-analyses are considered the highest level of evidence in evidence-based medicine and other fields. They provide an objective and rigorous assessment of the available evidence, helping to guide clinical practice, policy decisions, and further research.

By pooling data from multiple studies, meta-analyses can provide more precise estimates of treatment effects or other outcomes of interest.

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The number of trees saved by this process is 68trees

A rate is a ratio in which the two terms being compared have different units.For example, *

3 guest to a table. Rates often use the word per. Therefore we can say 3guest per table.

Similarly I tonne of recycled office paper save 17trees.

If 1 tonne = 2000pounds

then 2000pounds save 17trees

therefore 1 pound will save 17/2000 trees

8000 pounds will therefore save 17/2000× 8000

= 17×4= 68 trees

Therefore 8000pounds of recycled office paper will save 68 trees.

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Answer:

if the marble slab is 1 cm³ in volume the mass is 2.7 g but u did not put a volume

Answer:

1&3

1&4

2&3

2&4

are all supplementary angles

Answer:

The answer is:

1&3

1&4

2&3

2&4

Step-by-step explanation: did it on edge 2022.

Answer:

F. Yes, by the SAS Congruence Theorem

Explanation:

In △ABC and △EDC:

Hence, by the SAS Congruence Theorem, which states two triangles, with two sides and one angle equal, as congruent.

△ABC ≅ △EDC

Answer:

- 11r³ + 3r + 16

Step-by-step explanation:

( 8r - 4r³ + 8 ) - ( 5r - 8 + 7r³ ) =

= 8r - 4r³ + 8 - 5r + 8 - 7r³ =

= - 11r³ + 3r + 16

In this dissertation about the insect Desmolithica Geogebra, the searching period S(t) of the insect depends on the air temperature denoted by t and is directly proportional to t-20.

The percentage of the larvae that survive this period N(t) is inversely proportional to t-20 and depends on t.

These statements can be mathematically represented as:

S(t) ∝ (t - 20)

and

N(t) ∝ 1/(t - 20)

For S(t) and N(t) to be directly and inversely proportional to (t - 20), respectively, we need to assume that the relationship is linear.

That is, S(t) and N(t) can be represented by linear equations of the form:

S(t) = m(t - 20)

and

N(t) = k/(t - 20)

where m and k are constants that depend on the particular observation regarding the behavior of the insect.

These constants can be determined by using the data from the observations.

The dissertation can further explain the significance of these relationships in understanding the behavior of the insect, as well as in developing strategies to control or prevent the damage caused by the insect.

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Answer:

She is incorrect

Step-by-step explanation:

If you square 4 you get 16 and divide 16 and 2 you get 8 so shes wrong.

Answer: Clara is incorrect

Step-by-step explanation:

The square root of 4 is 2

2 ÷ 2 = 1

You end up with 1 not 4, therefore, Clara is wrong.

Edit: Look at the other answer, I sadly made a mistake thinking the question said square root but it said square I apologize .

The order approximately 1.1111 cubic yards of topsoil from the dirt store.

The volume of topsoil required in cubic feet.

The area of the garden is:

The area of the garden is found by multiplying the length and width of the garden. In this case, the garden is 15 feet by 12 feet, so the area is 15 ft x 12 ft = 180 sq ft.

Since we want a 2 inch thick layer of topsoil, we need to convert the thickness to feet:

2 inches = 2/12 feet = 0.1667 feet

The volume of topsoil required in cubic feet is therefore:

180 sq ft × 0.1667 ft = 30 cubic feet

To convert this to cubic yards, we divide by 27 (since there are 27 cubic feet in a cubic yard):

The dirt store sells topsoil by the cubic yard, so we need to convert our answer from cubic feet to cubic yards. Since there are 27 cubic feet in a cubic yard (3 feet x 3 feet x 3 feet)

30 cubic feet ÷ 27 = 1.1111 cubic yards

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The cross of a red oval with a purple oval will produce approximately 44.4% red long, 22.2% red oval, 22.2% purple long, and 11.1% purple oval offspring.

Based on the information given, we can represent the pure-breeding colors and shapes as follows:

Red color (RR) is dominant over white color (rr)

Long shape (LL) is dominant over round shape (ll)

We can also represent the hybrids as:

Purple color (Rr) is a result of a cross between red and white pure-breeding colors

Oval shape (Ll) is a result of a cross between long and round pure-breeding shapes

Given that we are crossing a red oval (RrLl) with a purple oval (RrLl), we can set up a Punnett square to determine the possible genotypes and phenotypes of their offspring:

RL Rl rL rl

RL RRLl RRll rRLL rRlL

Rl RRLl RRll rRLL rRlL

rL RrLL RrLl rrLL rrLl

rl RrLl Rrll rrLl rrll

From the Punnett square, we can see that there are nine possible phenotypes, which can be grouped by color and shape:

Red long (RRLL, RRLl, RrLL, RrLl): 4/9 or about 44.4% chance

Red oval (RRll, Rrll): 2/9 or about 22.2% chance

Purple long (rRLL, rRlL): 2/9 or about 22.2% chance

Purple oval (rrLL, rrLl, rrll): 1/9 or about 11.1% chance

Therefore, the cross of a red oval with a purple oval will produce approximately 44.4% red long, 22.2% red oval, 22.2% purple long, and 11.1% purple oval offspring.

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Marcus picks out 2 shirts that are on a 30% off rack. If the shirts are originally priced at $28.99 and $30.29 and there is 6% sales tax, the amount Marcus has to pay for them is $37.70.Option (b) $37.70 is the correct answer.

How to calculate the final price Marcus has to pay?Let us begin with calculating the 30% discount Marcus gets for picking out 2 shirts that are on a 30% off rack.30% discount means Marcus gets to save (30/100) × (28.99 + 30.29) = $17.63Marcus' savings = $17.63The original price of the 2 shirts = $28.99 + $30.29 = $59.28Now, Marcus gets 10% off on the already reduced prices,

which means he gets an additional discount of (10/100) × $41.65 = $4.17Therefore, the new discounted price = $41.65 - $4.17 = $37.48The sales tax is 6% of $37.48Sales tax = 6/100 × $37.48 = $2.25Therefore, Marcus has to pay $37.48 + $2.25 = $39.73This is the amount Marcus has to pay.

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Answer:

\(\sf\longmapsto\sf\boxed {x = 1}\)

Step-by-step explanation:

\(\sf\longmapsto \: 2x + 10 = 12\)

\(\sf\longmapsto \: \: 2x + 10 - 10 = 12 - 10\)

\(\sf\longmapsto \: 2x = 2\)

\(\sf\longmapsto \: \frac{2x}{2} = \frac{2}{2} \)

\(\sf\longmapsto \: x = 1\)

Answer:

\(\boxed {\sf x=1}\)

Step-by-step explanation:

\(\sf 2x+10=12\)

\(\boxed{\mathrm{Subtract\:}10\mathrm{\:from\:both\:sides}}\)

\(\boxed{\mathrm{Divide\:both\:sides\:by\:}2}\)

\(\boxed{\sf Hope\: it\:helps!}\)