073023 ✓Mailings Review View Help11 12 13 14 15 16 17 18 9 10 11 12 13 14 1 15. I 16.ng. unom your voten. Eavinom To ayurvION IS pornw.1. A study was made to check whether it is true that on the daily average income,men earn more than women in a certain company. The data are as follows:Solutions:SearchSexMaleFemaleNo. of Workers7560MeanP 518.22P 481.65SDP 36.20P 33.85State the null hypothesis and subject to statistical testing. Use 0.05 level ofconfidence.I.

SexNo. of workersMeanSDMale75518.2236.2Female60481.6533.85Significance level

Answered: 1. A study was made to check whether it…

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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The following data represents the monthly cost for telephone service for a random sample of 8 households in Wilmington. 43, 47, 51, 36, 50, 42, 38, 41, 39 Construct a 95% confidence interval for the population average monthly expenditure
1
Which of these scenarios means that a pretest-posttest design with a non-equivalent control group is not suitable? Select all that apply. O a. All of the available participants will be receiving the intervention at the same time. O b. Authors want to examine for any trends in the data over time. O c. The participants were placed into the experimental and control groups by natural circumstances rather than random assignment. O d. Authors want to compare averages between two groups before and after the intervention using an ANOVA.
Suppose a study reported that the average persin watched 3.37 hours of television per day. a random sample of 15 people gave the number of hours of television watched per day shown below. at the 1% significance level, do the data provide sufficent evidence to conclude that the amount of television watched per day last year by the average person is greater than the value reported in the study? what is the test statistic value for this problem? a.0.28 b.-38 c.none of the above d. 0.58 e.-4.295 f..04 g. 1.94 . the proper conclusion for this problem is? a. reject the null hypothesis we have sufficent evidence to prove the average number of hours people watch tv is more than 3.37 hours. b. Do not reject the null hypothesis we have sufficient evidence to prove the average number of hours of TV watched is greater than 3.37 hours c. Reject the null hypothesis and claim the average number of hours people watch TV is less than 3.37 because the P value is near zero d. Do not reject the null…
2. University researchers claim that the average enrollment at four-year colleges is higher than two-year community colleges. Two surveys are undertaken at 35 four-year universities and 35 two-year colleges. The mean enrollment at the four-year institutions was 5,466 with a standard deviation of 8,191. The average enrollment at the two-year schools was 5,068 with a standard deviation of 4,777. Using a 95% confidence level, are the findings of the surveys consistent with the university researchers’ claim? 2. Does the null hypothesis reject H0 or fail to reject H0?
. A university examines the variability in the math scores of students accepted to the business and engineering schools. The table below presents sample data from the most recent incoming class.Engineering BusinessSample Standard Deviation 122.4 106.5Sample Size 16 19Perform a hypothesis test to determine whether the variation in math scores is different if ? = 0.05.
1) Is the test significant? A. Unable to determine B. No, p = .448 C. Yes, p = <. 001 D. Yes, p = .448 2) In order to determine where the main mean differences lie, the researcher would also need to conduct a ____? A. Correlation B. MANOVA C. post-hoc analysis D. t-test
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Which of the following is/are TRUE at 5% level of significance? I. We can assume independence of errors since the subjects were randomly assigned to one of the three diets. II. We have sufficient evidence to say that the data are not normally distributed for each diet.A. I only B. II only C. Both I and II D. Neither I nor II
Suppose the following data show the percentage of 17- to 24-year-olds who are attending college in several metropolitan statistical areas in four geographic regions of the United States. Northeast Midwest South West 28.4 37.0 60.2 16.6 39.2 32.9 37.0 34.3 32.2 22.4 28.3 22.8 46.4 44.5 40.3 12.5 32.9 31.9 33.4 42.9 15.6 57.5 19.5 26.1 36.4 31.6 29.6 57.8 35.5 64.8 67.2 13.5 37.7 28.1 31.9 36.6 59.1 55.2 29.4 28.6 61.3 78.4 39.8 17.8 41.5 29.6 32.7 74.3 30.1 53.0 36.7 23.3 51.1 28.4 34.2 25.0 59.9 25.0 29.4 59.0 53.5 27.2 20.4 30.6 32.2 29.4 42.4 23.0 25.3 70.8 33.9 73.1 23.2 33.1 36.3 31.0 36.7 28.5 31.2 34.3
A researcher believe that increasing attention given to children will improve academic performance. He invites parents to volunteer during school to help the children with their activities. At the end of the school year he compares the academic performance of these children with the mean and standard deviation of historical rate on academic achievement. Which statistic test is appropriate for this study and why? (By using the decision tree). A. Z test B. Single sample t test C. Two independent samples t test D. Two related samples t test E. One way between subjects ANOVA F. Correlation

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