Summarize categorical data for two categories in two-way frequency tables. Interpret relative frequencies in the context of the data (including joint, marginal, and conditional relative frequencies). Recognize possible associations and trends in the data.
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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