Select Questions

Lessons 1 to 10

1. (Lesson 1) Bill picked people at random and recorded their heights. What kind of sequence is he creating?
random
systematic

2. (Lesson 1) If you recorded the height of a child as she grew up, you would get a ______________ sequence.
systematic
random

3. (Lesson 2) Bob recorded the rain fall in inches each month for 10 years and then constructed a histogram from this sequence of numbers. What information does this histogram NOT show?
the highest rain falls during the ten years.
the range of rain falls during the ten years.
whether rain fall is increasing or decreasing over the 10 year period .
the lowest rain falls during the ten years.

4. (Lesson 2) The horizontal axis on a histogram shows
the number of cases
the possible values in the sequence
the relative frequency of the values
the potential number of cases

5. (Lesson 3) Divide the range of scores by 10. This is a rule of thumb for determining what?
number of intervals of a histogram
estimating the median
interval size of a histogram
computing the mean

6. (Lesson 3) Given a set of data, only one specific histogram is correct for the data.
false
true

7. (Lesson 4) What is the range of the numbers below? 2 7 9 3 5 12 17 4 6
9
5
15
17

8. (Lesson 4) Sue measured the heights of a class of students in college. Would she expect the range of the scores to be zero?
yes
no

9. (Lesson 5) The r.m.s. of the three numbers below is -2 0 + 2
8
1.633
2.5
4

10. (Lesson 5) Can the SD ever be a negative value?
no
yes

11. (Lesson 6) The mean and SD of a set of numbers is 33.0 and 30,respectively. Each number in the set is increased by 5. (5 is added to each number) The new mean and SD are
38, 30
38, 35
33, 35
33, 30

12. (Lesson 6) The mean and SD of a set of numbers is 40.0 and 10,respectively. Each number in the set is multiplied by 5. The new mean and SD is
200, 50
200, 15
40, 10
40, 50

13. (Lesson 7) The percent of college students' weights that are expected to fall within 2 standard deviations above or below the mean is about
95%
50%
100%
68%

14. (Lesson 7) If scores on an extroversion scale were collected for all 8th graders in a middle school, what percent of their scores would be expected to fall between +1 and -1 standard deviations from the mean?
about 50%
about 32%
about 99%
about 68%

15. (Lesson 8) What is the median for the set of scores below? 2, 4, 6, 8
4
6
5
5.5

16. (Lesson 8) What is the 25th percentile for the set of scores below? 2, 5, 6, 7, 9
5
6
7
3.5

17. (Lesson 9) The __________ is sensitive to extreme scores whereas the ____________ is not.
median, mean
mean, median

18. (Lesson 9) Saying that a set of scores is not skewed means that
no statement about the values of the mean and median can be made
the mean and median agree in value

19. (Lesson 10) Calculate the % of the patients in a study who had IQ scores 120 and above. The scores were 102, 104, 106, 107, 110, 115, 120, 121, 122, 125
40 %
50 %
45.5 %
30 %

20. (Lesson 10) A physician doing research on the improvement of cancer patients who took a new drug found that _______% of the following patients improved, coded 0 for no improvement and 1 for improved. The patients' scores were 0 1 0 1 0 1 1 1 0 0 0 1 0 1 0 1 1 1 0 0
70
60
50
40