A researcher is interested in the idea of a Protestant work ethic. She conducts arandom survey on weekly hours worked by people in employment. The 3,453Protestants in the survey work a mean of 39.360 hours per week, with astandard deviation of 13-182 hours, while the 6,044 Catholics work a mean of42.206 hours per week with a standard deviation of 13.690 hours.a. Assuming the population variances are the same is there any evidencethat Protestants work more hours than Catholics?b. Test whether the assumption of equal population variances is valid and,if necessary, redo part a assuming the population variances are different.c. Does this tell us whether the Protestant work ethic exists? Be sure toexplain why or why not.

From the given information, the researcher is interested in the idea of a protestant work ethic.…

Answered: A researcher is interested in the idea…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A department-store chain randomly sampled 10 stores in a state. After a review of sales records, it was found that, compared with the same period last year, the following percentage increases in dollar sales had been achieved over the Christmas period this year:10.2 3.1 5.9 7.0 3.72.9 6.8 7.3 8.2 4.3a. Calculate the mean percentage increase in dollar sales. b. Calculate the median.
Adult Great Basin rattlesnakes have a mean length of 32.5 inches and a standard deviation of 6.6 inches; the length of adult Southern Pacific rattlesnakes is also 32.5 inches on average, but with a standard deviation of 9.9 inches. Both species have lengths that follow a normal distribution. You randomly select one Great Basin rattlesnake and one Southern Pacific rattlesnake. Which is more likely be longer than 35.8 inches? a. The Southern Pacific rattlesnake. b. Not enough information is provided, it depends. O c. Both are equally likely to be more than 35.8 inches long d. The Great Basin rattlesnake.
1. Assume that the time a student stays in school is normally distributed with a mean of 5 hours and a standard deviation of 0.5 hours. Every day, lan stays in school for 5.5 hours. What proportion of students stays less than 5.5 hours?
The average waiting time in a doctor’s office varies. The standard deviation of waiting times in a doctor’s office is 3.4 minutes. A random sample of 30 patients in the doctor’s office has a standard deviation of waiting times of 4.1 minutes. One doctor believes the variance of waiting times is greater than originally thought.a. What type of test should be used?b. What is the test statistic?c. What is the p-value?d. What can you conclude at the 5% significance level?
A meteorological association has recorded atmospheric concentrations of carbon dioxide outside its research station at noon every day for one week. The list of concentrations in parts per million is 415.10 415.92 416.00 414.95 413.75 415.60 415.83 a). Find the sample mean. b). Find the sample variance. c). Find the sample standard deviation.
Suppose that the daily intake of an adult follows a uniform distribution from 40 to 65 micrograms. Suppose that 36 adults are randomly selected. What is the mean and standard deviation of the average intake for 36 adults. a. Mean= 52.5 stvdev = 1.2 b. Mean = 55 stvdev= 7.22c. Mean = 52.5 stvdev = 2.08 d. Mean= 52.5 stvdev = 7.22
The National Coalition on Healthcare suggests that the mean annual premium that a health insurer charges an employer for a health plan covering a family of four averaged $13,000 in 2009. A sample of 30 families of four yields a mean annual premium paid by their employer to be $13,500 with a sample standard deviation of $300. We are interested in whether the mean annual premium that a health insurer charges an employer for a health plan covering a family of four is different from $13,000 using a significance level of 0.10. Select one: a. tdata = 9.129, do not reject Ho. b. tdata = 9.129, reject Ho. c. tdata = -9.129, do not reject Ho. O d. tdata = 4.156, reject Ho.
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A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by membership member shoppers. Suppose a random sample of 100 membership member shoppers who recently made a purchase on the web site yielded a mean amount spent of $55 and a standard deviation of $52. Complete parts (a) and (b) below. a. Is there evidence that the population mean amount spent per year on the web site by membership member shoppers is different from $51? (Use a 0.01 level of significance.) State the null and alternative hypotheses. Ho: H (Type integers or decimals. Do not round. Do not include the $ symbol in your answer.) Identify the critical value(s). The critical value(s) is/are (Type an integer or a decimal. Round to two decimal places as needed. Use a comma to separate answers as needed.) Determine the test statistic. The test statistic, 1STAT, is (Type an integer or a decimal. Round to two decimal places as needed.) State the conclusion. Ho. There is evidence that the…
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1) According to Consumer Expenditures, the average consumer spent $1729 on apparel and services in 2017. In 2018, a random sample of 36 consumers had a mean of $1667.11 and a standard deviation of $351.69. Can it be said that at the 5% level of significance that the mean level of consumption differed in 2018 with respect to 2017?

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