# Question: Random samples of 30 professors of ethics and 30 professors

Random samples of 30 professors of ethics and 30 professors in other disciplines (not ethics) were asked how many days it had been since they contacted their mothers; this included phone calls and face-to-face meetings. Professors whose mothers were not living were not included. The resulting data are shown.

a. Describe the shapes of the distributions of the samples.

b. Find and compare the sample means.

c. Find and compare the sample medians.

d. Perform a two-sample t-test to determine whether the population means are different at the 0.05 significance level. Assume that the sample sizes are large enough so that the approximate p-value will be good.

e. Perform a Mann-Whitney test to determine whether the medians are significantly different at the 0.05 level.

a. Describe the shapes of the distributions of the samples.

b. Find and compare the sample means.

c. Find and compare the sample medians.

d. Perform a two-sample t-test to determine whether the population means are different at the 0.05 significance level. Assume that the sample sizes are large enough so that the approximate p-value will be good.

e. Perform a Mann-Whitney test to determine whether the medians are significantly different at the 0.05 level.

## Answer to relevant Questions

Refer to the following two histograms and QQ plots of the same data. a. Match each of the histograms with the corresponding QQ plot. Histogram 1 goes with QQ plot ____. Histogram 2 goes with QQ plot ____. b. Describe the ...Find the difference in number of texts received and the number sent for females. Do the same for males. Then determine whether the differences are significantly different at the 0.05 level using the two-sample t-test. Figure A shows a scatterplot for the U.S. population (in millions) from 1850 to 1900. Figure B shows a residual plot of the same data. Give the reasons why the linear model is not appropriate for predicting the population in ...The output shows the results of a regression analysis to predict the father's education given the mother's education for a random sample of students at a two-year college. Assume that this sample is representative of the ...The table shows the number of floors and the height (in feet) of the five tallest buildings in Singapore. The regression model for predicting the number of floors from the height of the building is Predicted Floors = -32.4 ...Post your question