Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. Suppose a random sample of employees gave the following information.   x 2 8 14 32 73 y 50 45 35 28 16 As x increases, does the value of r imply that y should tend to increase, decrease, or remain the same? Explain. Group of answer choices   Since r is negative, as x increases

Q: A population is normally distributed with a mean of u = 145 and o 20. Which is the percentile rank…

A: According to the given information, we have The distribution is normal. Mean = 145 Standard…

Q: The following data consist of the present school enrollment of the Dr Vesse High School. A study on…

A: From the provided information, Total population = 150 + 185 + 220 + 245 = 800 Margin of error (E) =…

Q: A student must have a B average or better for all courses to qualify for any athletic team at…

A: From the table, we see that 4 students are both B and hockey players.  There is a total of…

Q: Do larger universities tend to have more property crime? University crime statistics are affected by…

A: a) Step to draw scatter diagram using Excel: Enter the data in different columns in Excel…

Q: The proportion of all high school students who watch national news is p = 0.47. A random sample of…

A: Given n = 50 p = 0.47 Therefore,  np = 50×0.47 = 23.5 n(1-p) = 50(1-0.47) = 50(0.53) = 26.5

Q: his year Carroll graduates 8 physics majors, and each of them takes a standardized national physics…

A: Solution-: Given: μ0=71,n=8, α=0.1 We find, (a) Test statistic=? (b) p-value=?

Q: Do larger universities tend to have more property crime? University crime statistics are affected by…

A: Given that, A random sample of n = 8 universities in California gave the following information about…

Q: . Given the population of 3 children ages: 3, 4, and 5 a) Write the distribution of all sample…

A: Sample is a subset of the population. Population is the set of all objects of interest. Measures of…

Q: Here is a bivariate data set in which you believe y to be the response variable. y 61.3 38 56.3 38.3…

A: Scatter plot: Excel Procedure: Enter x and y in Excel>Data>Data Analysis>…

Q: Q2. An economist is interested in the relationship between the disposable income of a family and the…

A: Let x denotes disposable income in thousands of taka y denotes food expenditure in hundreds of taka…

Q: Lori Jeffrey is a successful sales representative for a major publisher of college textbooks.…

A: Given that :  The proportion of Lori Jeffrey sales calls for one month is 25%  which is mean of the…

Q: We want to check if each model of a product is equally preferred by our customers.   Model Number…

A: Given: Model Observed number of sales A 15 B 25 C 20 D 35 E 40 Sum = 135 Each model…

Q: Students in an experimental psychology class did research on depression as a sign of stress. A test…

A: Given n=30

Q: Q2. An economist is interested in the relationship between the disposable income of a family and the…

A: The independent variable is x, disposable income. The dependent variable is food expenditure. We…

Q: How large of a sample is needed to estimate the mean of a normally distributed population if we know…

A: Given,standard deviation (σ)=36margin of error(ME)=7α=0.10α2=0.05Z0.05=1.645   (from Z-table)

Q: The boxplot below shows salaries for CPAS and Actuaries in a town. CPA H Actuary 20 30 40 50 60 70…

A: Given: The boxplot below shows salaries for CPAs and Actuaries in town. To find: Percentage of…

Q: The proportion of all high school students who watch national news is p = 0.47. A random sample of…

A:

Q: The following data consist of the present school enrollment of the Dr. Vesse High School. A study on…

A: Given the table is

Q: Let x be the average number of employees in a group health insurance plan, and let y be the average…

A:

Q: 3. The data show the amounts (in thousands of dollars) of the contracts for soft drink in randomly…

A:

Q: The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher 20 25…

A: Data visualization is the process of denoting the numerical data visually. Data visualization can be…

Q: A sample of 50 people are selected at random from a population and it is found that 12 people in…

A: Given a sample of 50 people are selected at random from a population and it is found that 12 people…

Q: A company gives the percentage of defective products as 6% or less. Use the sample below to…

A: Given: p0=0.06n=50x=5 The significance level is taken as 0.05.

Q: The data in the accompanying bar graph are from a random sample of 838 adults. The graph shows four…

A: Given that,   Critical values: By using the standard normal table of Z, the critical value 95%…

Q: Students in an experimental psychology class did research on depression as a sign of stress. A test…

A: Students in an experimental psychology class did research on depression as a sign of stress. A test…

Q: Do larger universities tend to have more property crime? University crime statistics are affected by…

A: Given data is x 11.1 30.0 24.5 14.3 7.5 27.7 16.2 20.1 y 22 69 39 23 15 30 15 25

Q: Do larger universities tend to have more property crime? University crime statistics are affected by…

A: The correlation coefficient tells about the linear association between the explanatory variable and…

Q: Two raters, one male and one female, reviewed the same 50 video recordings of police interviews of…

A: Given: The number of ‘+’ judgments by female raters = x1 = 15. The number of ‘+’ judgments by male…

Q: To determine whether caffeine consumption affectsthe ability to solve math problems, a researcher…

A: According to the provided question, a study was conducted to test the caffeine consumption affects…

Q: a national caterer determined that 87% of the people who sampled food said it was good. A random…

A: The sample proportion is an unbiased estimator of population proportion i.e. E(^p)=P where…

Q: the number of faculty and the number of students are shown for a random selection of small colleges.…

A: This example is related to Hypotheses testing  that is significance of correlation coefficient needs…

Q: Let x,,X, x,~ normal (u,10 )and S' be the sample variance, the 90th percentile for s' equals a)…

A: PS2≤x = 0.9 P5S210≤5x10 = 0.9 Pχ25≤5x10 = 0.9 we get using excel function,  CHI.INV(0.9,5) = 9.2364…

Q: Find the weighted estimate, p, to test the claim that p, <p2. Use a = 0.10. The sample statistics…

A: Given that, n1=550x1=121n2=690x2=195

Q: In a sample of 500 parts produced by a grinding machine, 396 parts were defective. A test is…

A: given:   Sample size n = 500 Number of defective parts = x = 396

Q: oy's Texaco wants to keep the price of its unleaded gasoline competitive with that of other stations…

A: Given data : 1.7, 1.5, 2.6, 2.2, 2.4, 2.3, 2.6, 3.0, 1.4, 2.3

Q: According to a recent​ survey, 53% of adults say they never wear a helmet when riding a bike.…

A:

Q: Do larger universities tend to have more property crime? University crime statistics are affected by…

A:

Q: urvey of a group's viewing habits over the last year revealed the following (ii) 29% watched…

A:

Q: The boxplot below shows salaries for CPAS and Actuaries in a town. СРА Аctuary 30 40 50 60 70 80 90…

A: Solution Here  the minimum value of Acturies is at the first quartile of CPA

Q: For a sample with s = 9, a score of X = 67 corresponds to z = +1.00. What is the sample mean? M = 58…

A: Given: s=9 X=67 z=+1.00

Q: A biology professor claims that, on the average, 15% of her students get a grade of A, 25% get a B,…

A:

Q: Assume that you want to test the claim that the paired sample data from a for which the mean…

A: The following information has been provided:   X Y Difference = Sample 1 - Sample 2   11 8 3…

Q: In an experiment, a group of college students was told that they were participating in a manual…

A: Test Statistics = -1.391 Image is attached with detailed explanation.

Q: How profitable are different sectors of the stock market? One way to answer such a question is to…

A: From the given information, n1=31x¯1=14.7σ1=3.4n2=36x¯2=9.8σ2=3.8 Confidence level is 0.95.…

Q: The boxplot below shows salaries for CPAS and Actuaries in a town. СРА Actuary 20 30 40 50 60 70 80…

A: From the provided information, if a person is making the third quartile salary for a CPA, then his…

Q: The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher 20 25…

A: We have to find correct answer.

Q: A biology professor claims that, on the average, 15% of her students get a grade of A, 25% get a B,…

A:

Q: Students in an experimental psychology class did research on depression as a sign of stress. A test…

A: Given data:…

Q: A real estate agent wishes to determine whether tax assessors and real estate appraisers agree on…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.