Formulate the null and alternative hypothesis in each case:
a. Ten years ago the average American drank 2.5 cups of coffee per day. You suspect that amount has changed since then.
b. A researcher at Ohio State University speculates that the average SAT score for entering freshmen is higher than the national average of 1,650.
c. The manager of the University of Iowa bookstore suspects the average amount of money a student spends on books is less than the reported 400.
Question 2
In order to represent a nominal variable with m categories, we must create m - 1 indicator variables.
Indicate whether the statement is true or false
H. erectus migrated out of Africa beginning about 1.8 million years ago and is first known from Geor
Growth Chart for American Girls From Birth Through Age 3 Growth slows from infancy to toddlerhood b
Average Global Temperature Rise over the Past Century
American Government: Roots and Reform, 2009 Edition
In Canada, 2/3 women and over 1/2 of men 55 to 64 years of age are grandparents
In 2000, the average charge of tax preparation was 95 . Assuming a normal distribution and a ...