Stat 2000 International – Sample Midterm 1 – Solutions
1. The answer is: a) Determining the difference between a plot with r = 1 and r
= .95. [For r = 1, all points fall exactly on an increasing line, for r = .95,
points are close to an increasing line but not all on this line.]
2. b) heart disease
3. d) All of the above
4. The analysis of the graph indicates that the histogram is not what you would
expect to observe if the coins are fair. The histogram indicates an unusually
large number of heads.
5. d) All of the above
6. c) .97
7. c) 47
8. d) The probability of the other is changed
9. 23.0%
10. b) This is a theoretical probability, since a Punnett square was used to
determine the probabilities.
11. b) systematic sample
12. a) 74.5%
13. b) At least 75% of the states plus DC in the "32 to 37" group have teacher
salaries above the median teacher salary of the "26 to 31" group
14. About 69 inches.
