You are testing the claim that the mean GPA of all the night students is different from the mean GPA of allthe day students.A sample of 25 night students and 29 day students and their GPA's are recorded below.Test the claim using a 10% level of significance.It is reasonable to assume samples represent populations with normal distributions.Click this button to reveal the data. Click again to collapse it.GPA-Night2.963.613.373.293.213.04GPA-Day3.4732.553.372.633.312.963.812.553.393.452.642.582.913.393.212.833.343.643.63.523.553.42.923.183.033.183.282.963.583.593.263.192.812.883.43.363.22.823.023.243.122.833.333.363.383.23.25 a. What is the alternative hypothesis for this test? Note this may view better in full screen mode.Select the correct sign and enter the claimed value.142?Ha: 1-Use Excel to test the above claim using the given data. Need help? Check the video at the bottom.b. What test in Excel Data Analysis would you use for this problem?Ot-Test: Two-Sample Assuming Equal VariancesOt-Test: Two-Sample Assuming Unequal VariancesOt-Test: Paired Two Sample for MeansCheck the values for Observations and Hypothesized Mean Difference in your Excel output toconfirm you did the test correct.Then answer the following:(Give answer to 4 decimal places)At a 10% level of significance, fill in the blanks for the following statements.d. The p-value is Select an answer the significance level.c. p-value=e. The null hypothesis is Select an answerf. It is Select an answer that the average GPA is same for all the students in the two groups.g. This p-value suggests that the observed samples are Select an answernull hypothesis was true.if theh. There is Select an answer evidence that the mean GPA of all the night students is different fromthe mean GPA of all the day students.

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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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Empathy among police officers influences how they interact with citizens and the likelihood that they receive complaints. Gender differences in levels of empathy in the general population are not large but male and female officers have been shown to have different interaction styles with the public; this may be due to the different empathy levels. After sampling officers and measuring their levels of empathy you find the following data. Males Females n = 6 n = 9 M = 31 M = 45 SS = 490 SS = 680 If you were going to make gender comparisons like this, which option would be the correct choice? Write A or B in the box. [a] Option A. Independent-measures t-test Option B. Repeated-measures t-test
M3
or each of the situations below, name the statistical test that you would use to analyze the data. It is possible that some test may be used more than once, or not at all. Options: one-sample z, two-sample z, one-sample independent-measures t, one-sample repeated-measures t,one-way independent-measures ANOVA, one-way repeated-measures ANOVA, two-way independent-measures ANOVA,Pearson correlation, Spearman correlation, point-biserial correlation, simple regression, multiple regression,chi-square for independence, chi-square for goodness-of-fit, binomial,Wilcoxon Rank Sums test, Wilcoxon Signed Rank T, Mann-Whitney U, Kruskal-Wallace H, Friedman chi-square 11. __________________________________________ An art professor is accused of showing favoritism to art majors in her courses. To defend her grading practices, the Dean compares the numbers of As, Bs, Cs, Ds, and Fs awarded to majors and minors, and finds that no favoritism exists.12. __________________________________________ Studies…
Test the claim that for the population of college students, the mean weight equals to 132 lb. Sample data are summarized as n=101, x¯¯¯x¯x¯¯¯x¯=137 lb, s=14.2 lb. Use a significant level of 0.10.
see picture for graphic and questions. Explanation The Cadet is a popular model of sport utility vehicle, known for its relatively high resale value. The bivariate data given below were taken from a sample of fifteen Cadets, each bought new two years ago, and each sold used within the past month. For each Cadet in the sample, we have listed both the mileage x (in thousands of miles) that the Cadet had on its odometer at the time it was sold used and the price y (in thousands of dollars) at which the Cadet was sold used. The least-squares regression line for these data has equation =y−41.67 - 0.49x. This line is shown in the scatter plot below.
Which one?
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You wish to determine if there is a linear correlation between the age of a driver and the number of driver deaths. The following table represents the age of a driver and the number of driver deaths per 100,000. Use a significance level of 0.01 and round all values to 4 decimal places. Driver Age 65 69 48 37 49 27 62 64 Ho: p = 0 Ha: p = 0 r= Find the p-value p-value= Number of Driver Deaths per 100,000 22 22 34 Find the Linear Correlation Coefficient The p-value is Greater than a Less than (or equal to) a 23 28 20 The p-value leads to a decision to O Do Not Reject Ho O Accept Ho O Reject Ho 33 33 The conclusion is O There is a significant negative linear correlation between driver age and number of driver deaths. There is a significant linear correlation between driver age and number of driver deaths. O There is insufficient evidence to make a conclusion about the linear correlation between driver age and number of driver deaths. O There is a significant positive linear correlation…
The Focus Problem at the beginning of this chapter asks you to use a sign test with a 10% level of significance to test the claim that the overall temperature distribution of Madison, Wisconsin, is different (either way) from that of Juneau, Alaska. The monthly average data (in °F) are as follows. Month Jan. Feb. March April May June Madison 17.8 21.4 31.8 46.9 57.1 67.8 Juneau 22.8 27.5 31.8 38.6 46.2 52.7 Month July Aug. Sept. Oct. Nov. Dec. Madison 71.9 69.5 60.8 51.7 35.6 22.2 Juneau 55.6 54.9 49.3 41.1 32.5 26.3 (a) What is the level of significance? (b) Compute the sample test statistic. (Use 2 decimal places.) (c) Find the P-value of the sample test statistic
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Ungrouped data: 12, 34, 28, 26, 32, 28, 40, 36 What percentage of values is below the mean? What is the difference between the median and the range?

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