28. Below is a frequency distribution table of the number of naps that mothers give their children daily. Number of naps f 4 1 3 8 2 15 1 8 0 8 a. What is the variable of interest? b. What is the level of measurement of this variable
28. Below is a frequency distribution table of the number of naps that mothers give their children daily.
| Number of naps | f |
| 4 | 1 |
| 3 | 8 |
| 2 | 15 |
| 1 | 8 |
| 0 | 8 |
a. What is the variable of interest?
b. What is the level of measurement of this variable?
c. What is the sample size (n)?
d. What is the most appropriate graph for this data?
e. Construct a graph of this data.
29. The following table lists the distribution by degrees in psychology conferred by degreegranting institutions, by sex and year. These and similar data are reported by the National Center of Education Statistics (NCES) at http://nces.ed.gov/programs/digest/.
| Bachelor's Degree | Males | Females |
| 1970-71 | 21,2227 | 14,602 |
| 1980-81 | 14,332 | 26,736 |
| 1990-91 | 16,067 | 42,588 |
| 2000-01 | 16,585 | 57,060 |
| 2005-06 | 19,865 | 68,269 |
Based on the data in this table, how has the number of degrees conferred in psychology changed sex since 1970-71?
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