Calculate statistics for two categorical variables.
Example Problems
Tom took 4 exams. His mean was and his standard deviation was . What scores did Tom receive on his exams?
a. Write two sets of 5 different numbers that have the same mean but different standard deviations.
b. Write two sets of 5 different numbers that have the same standard deviations but different means.
b. Write two sets of 5 different numbers that have the same standard deviations but different means.
A bookstore surveyed customers on preferred book format.
How many students prefer eBooks?
| Format | Hardcover | Paperback | eBook |
|---|---|---|---|
| Students | 20 | 35 | 45 |
| Adults | 50 | 40 | 10 |
How many students prefer eBooks?
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