Questions from Statistics

Q: Cell phone bills (rounded to the nearest dollar) for the

Cell phone bills (rounded to the nearest dollar) for the most recent month for random samples of college men (M) and college women (F) were studied. Histograms for the numbers of dollars for men and w...

Q: Data were collected on the weights of 25 male baseball players and

Data were collected on the weights of 25 male baseball players and 25 male soccer players. Assume that these are random samples from all college baseball and soccer players. Refer to the Mann-Whitney...

Q: Figure A shows a scatterplot with the regression line for the ages

Figure A shows a scatterplot with the regression line for the ages and weights of a random sample of 19 college baseball players. Figure B gives a prediction (Fit), a prediction interval, and a confid...

Q: Figure A shows a scatterplot with the regression line for predicting the

Figure A shows a scatterplot with the regression line for predicting the father’s education from the mother’s education for a random sample of 29 students. Figure B...

Q: Data were collected showing the gestation period (in days) and

Data were collected showing the gestation period (in days) and the average longevity (in years) for 32 animals. Assume that all conditions of the linear regression model hold. The data are available o...

Q: The California Department of Education assesses progress of K–12 students

The California Department of Education assesses progress of K–12 students in meeting grade level standards in English/Language Arts and Mathematics yearly. A regression analysis was...

Q: A StatCrunch survey of happiness measured the happiness level for males and

A StatCrunch survey of happiness measured the happiness level for males and females. Each person selected a number from 1 (lowest) to 100 (highest) to measure her or his level of happiness. Figure A s...

Q: A StatCrunch survey was done asking what percentage of liquid intake was

A StatCrunch survey was done asking what percentage of liquid intake was in the form of soda. Figure A shows the output given. a. Figure B is a histogram of the percentage for the females. Describe th...

Q: Are women happier than men? A StatCrunch survey asked respondents to

Are women happier than men? A StatCrunch survey asked respondents to select a number from 1 (lowest) to 100 (highest) to measure their level of happiness. The sample mean for the 297 females was 71.15...

Q: In exercise 13.24 you compared credit card debts for college

In exercise 13.24 you compared credit card debts for college men and women using the Mann-Whitney test to compare medians. We’ll use the same data again, but this time you will apply...