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
2008 launch of the SM-3 missile used to destroy American spy satellite USA-193
Adolescence: 12 years or puberty to the beginning of adulthood.
A Scatterplot of the Test Scores and Average Grades of 10 Students
Earth 150 Million Years Ago
One hypothesis for the evolution of the eukaryotes