Questions from Statistics

Q: Professors of ethics (Eth), professors of philosophy (Phil),

Professors of ethics (Eth), professors of philosophy (Phil), and professors in fields other than philosophy or ethics (Other) were asked how many days it had been since they had last been in contact w...

Q: The mean age of all 2550 students at a small college is

The mean age of all 2550 students at a small college is 22.8 years with a standard deviation is 3.2 years, and the distribution is right-skewed. A random sample of 4 students’ ages is obtained, and th...

Q: A random survey was done at a small Lutheran college, and

A random survey was done at a small Lutheran college, and the students were asked how many hours a week they spent studying outside of class time. They were also asked what class they were in (1 = Fre...

Q: A random survey was done at a small Lutheran college, and

A random survey was done at a small Lutheran college, and the students were asked how many hours a week they spent watching TV. They were also asked what class they were in (1 = Freshman, 2 = Sophomor...

Q: Using the NHANES data, we performed an ANOVA to test whether

Using the NHANES data, we performed an ANOVA to test whether gender is associated with level of triglycerides, a form of fat, in the blood. ANOVA and t-test output from a two-sample t-test is shown. I...

Q: Using NHANES data, we performed one-way ANOVA and a

Using NHANES data, we performed one-way ANOVA and a two-sample t-test. In both cases we were testing the hypothesis that the mean cholesterol values for men and women are different. Compare the output...

Q: According to a 2017 report by ComScore .com, the mean

According to a 2017 report by ComScore .com, the mean time spent on smartphones daily by the American adults is 2.85 hours. Assume this is correct and assume the standard deviation is 1.4 hours. a. Su...

Q: Refer to the following figure. Assume that all data sets are

Refer to the following figure. Assume that all data sets are symmetric and that all the samples are the same size. Imagine carrying out two ANOVAs. The first compares the means based on samples A, B,...

Q: Suppose a person with access to student records at your college has

Suppose a person with access to student records at your college has an alphabetical list of currently enrolled students. The person looks at the records of every 10th person (starting with a randomly...

Q: Suppose a person with access to student records at your college has

Suppose a person with access to student records at your college has a list of currently enrolled students. The person sorts the data to create two new lists. One contains all the male names, the other...