A study analyzed the sustainability behaviors of CPA corporations. The level of support for corporate sustainability(measured on a quantitative scale ranging from 0 to 160 points) was obtained for each in a sample of 974 seniormanagers at CPA firms. The CEO of a CPA firm claims that the true mean level of support for sustainability is 71.Complete parts a through e below.i Click the icon to view a printout of the analysis.a. Specify the null and alternative hypotheses for testing this claim.O A. Ho: μ=71Ha: μ#71O C. Ho: μ#71H₂: H=71O B. Ho: μ = 71Ha: μ>71O D. Ho: μ = 71Ha: μ<71

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Answered: A study analyzed the sustainability…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A purch longevity of the light bulbs used in the projectors. The purchasing manager has narrowed down the choice of projector to two brands, Infocus and Proxima, and wishes to determine if there is any difference between the two brands in the mean lifetime of the bulbs used. manager for a large university is investigating which brand of LCD projector to purchase to equip "smart" classrooms. Of major concern is the The purchasing manager obtained fifteen projectors of each brand for testing over the last several academic terms. The number of hours the bulbs lasted on each of the fifteen machines is given in the table. Lifetimes of light bulbs (hours) Infocus 1091, 818, 1198, 796, 1045, 1084, 1026, 613, 915, 665, 812, 912, 567, 698, 812 Proxima 783, 850, 845, 777, 941, 751, 746, 883, 774, 826, 959, 938, 756, 695, 672 Send data to calculator v Assume that the two populations of lifetimes are normally distributed and that the population variances are equal. Can we conclude, at the 0.01…
TechBuzz is an IT company that monitors the status of large data warehouses. According to TechBuzz, last year the majority of the data servers used by energy-based companies were over-utilized. A sample of 190 servers (all used by energy-based companies) showed that 142 were over-utilized, 12 were used efficiently, and 36 were underutilized. a. What is the point estimate of the proportion of the servers that were under-utilized? b. Determine the margin of error and provide a 95% confidence interval for the proportion of the servers that were over-utilized. c. What is the minimum sam
A study analyzed the sustainability behaviors of CPA corporations. The level of support for corporate sustainability (measured on a quantitative scale ranging from 0 to 160 points) was obtained fo r each in a sample of 984 senior managers at CPA firms. The CEO of a CPA firm claims that the true mean level of support for sustainability is 66. Complete parts a through e. One sample t-test and z-test Theoretical mean: 66 Significance level (%): 5 Summary statistics: Variable Observations Minimum Maximum Mean Std. deviation Support 984 2.000 154.000 67.873 26.768 One-Sample z-test / Two-tailed test: 95% confidence interval on the mean: (66.200,69.546) Difference 1.8730 z (Observed value)…
A manager wishes to determine whether the mean times number of sick days differ for three levels of employees. He randomly selected 10 employees within each level (Hourly, Salaried, and Management). Decide what statistical procedure would most likely be used to answer the research question. Assume all assumptions have been met for using the procedure.
According to a dietary study. high sodium in take may be related to ucers. stomach cancer. and migraine headaches. The human requirement for salt is only 220 milligrams per day. which is surpassed in most single servings of ready-to-eat cereals. If a random sample of 20 similar servings of a certain cereal has a mean sodium content of 244 milligrams and a standard devlation of 24.5 miligrams, does this suggest at 0.05 level of significance that the average sodlum content for a single serving of such cereal is greater than 220 milligrams? The p-value of the test statistic in 6 decimal places and the critical value in two decimal places is: example answer: 0.123456 and 1.23
In a 2015 study entitled How Undergraduate Students Use Credit Cards, it was reported that undergraduate students have a mean credit card balance higher than $3000. This figure was an all-time high and had increased 42% over the previous five years. Assume that a current study is being conducted to determine if it can be concluded that the mean credit card balance for undergraduate students has continued to increase compared to the report. They want to test to see if the balance for students in 2019 is higher than the balance for students in 2015. See the sample below of undergraduate students in 2015 and different undergraduate students in 2019. Credit Card Increase Students in 2015 Students in 2019 2500 3300 2200 5450 1500 8000 930 2000 5300 870 1150 250 2700 3000 3300 2200 What can we conclude from this t-test? a) Reject the null hypotesis OR Fail to reject the null hypotesis? b) We can conclude that the student balance in 2019 are significatly…
A psychology student conducted a study on using a chief executive officer's facial structure to predict a firm's financial performance. The facial width-to-height ratio (WHR) for each in a sample of 47 CEOs at publicly traded firms was determined. The sample resulted in x=2.23 and s=0.35. The student wants to predict the financial performance of a firm based on the value of the true mean facial WHR of CEOs. The student wants to use the value of μ=2.1. Do you recommend he use this value? Conduct a test of hypothesis for μ to help you answer the question. Specify all the elements of the test, including H0, Ha, test statistic, p-value, and your conclusion. Test at α=0.01.
A consumer response team hears directly from consumers about the challenges they face in the marketplace, brings their concerns to the attention of financial institutions, and assists in addressing their complaints. The consumer response team accepts complaints related to mortgages, bank accounts and services, private student loans, other consumer loans, and credit reporting. An analysis of complaints over time indicates that the mean number of credit reporting complaints registered by consumers is 3.95 per day. Assume that the number of credit reporting complaints registered by consumers is distributed as a Poisson random variable. Complete parts (a) through (d) below. a. What is the probability that on a given day, no credit reporting complaints will be registered by consumers? = 0.0193 b. What is the probability that on a given day, exactly one credit reporting complaint will be registered by consumers? = 0.0761 c. What is the probability that on a given day, more…
A consumer response team hears directly from consumers about the challenges they face in the marketplace, brings their concerns to the attention of financial institutions, and assists in addressing their complaints. The consumer response team accepts complaints related to mortgages, bank accounts and services, private student loans, other consumer loans, and credit reporting. An analysis of complaints over time indicates that the mean number of credit reporting complaints registered by consumers is 3.95 per day. Assume that the number of credit reporting complaints registered by consumers is distributed as a Poisson random variable. Complete parts (a) through (d) below. a. What is the probability that on a given day, no credit reporting complaints will be registered by consumers? The probability that no complaints will be registered is nothing. (Round to four decimal places as needed.)
Identify the statistical test that should be used to analyze the data for the following study: Does a GRE prep course improve GRE scores? GRE practice test scores were compared before and after 40 students had taken a very expensive GRE prep course.
Asian Americans are a heterogeneous group often coined as one in national and state estimates of health data. Recent studies, however, have shown that some Asian American subgroups are more likely to die early due to cardiovascular disease and more likely to report metabolic syndrome. An epidemiologist wants to study the age of diagnosis of type 2 diabetes among two Asian American subgroups (Asian Indians, Koreans). The researcher had the following two questions: Is the mean age of diagnosis for type 2 diabetes among Asian Indians different than 55 years? Is the mean age of diagnosis of type 2 diabetes different between Koreans and Asian Indians? The epidemiologist should conduct which types of tests to answer the above 2 questions? None two-sample t test after checking for equal variance and a one sample t-test One-sample t test and two-sample t test after checking for equal variance One-sample t test and ANOVA One-sample t test and ANOVA
The Energy Star rating system is an energy efficiency program run by the U.S. Environmental Protection Agency (EPA)Energy Star certified appliances, such as televisions and refrigerators, are rated in regard to their average energy consumption per year. A certain brand of Energy Star certified refrigerator is stated to have a mean yearly electricity cost of $99. A consumer advocacy organization believes that this claim is wrong, that the energy consumption of this particular refrigerator is different than $99 per year. The group collected a random sample of 16 refrigerators of the model in question and had each lab-tested for electricity consumption. The yearly energy consumption of each is given below. 96.7697.898.67 95.52 97.8 95.896.9299.57 97.64 95.46 98.03 96.42 99.32 98.99 95.2197.12 Using alpha = 0.1 , test the hypothesis that the average yearly electricity consumption of the refrigerator in question is different than $99 per year. Assume that the distribution of all electricity…

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