Recall our study of college students in which we investigated the relationship between gender and body piercing. The null hypothesis says that the two variables are independent. (There is no relationship.) Here is the data. Female Male Row Totals Pierced Yes 576 72 648 Pierced No 64 288 352 Column Totals 640 360 1000 What percentage of the sample is not pierced? What is the expected count of females who are not pierced?

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Which of the following contains a variable?