Select Questions

Lessons 1 to 10

1. (Lesson 1) A roulette wheel manufacturer recorded the results of a roulette wheel for 5000 spins. He wanted to make sure that the results formed a ________ sequence.
systematic
random

2. (Lesson 1) Judy wrote the numbers 1 to 5 on pieces of paper and put them in a hat. She then shut her eyes, picked one out, wrote down the number, put it back in the hat, and then did this over and over. What kind of sequence would this generate?
random
systematic

3. (Lesson 2) The vertical axis of a histogram shows
range of scores
average value
possible values
relative frequency

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

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

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

7. (Lesson 4) What is the mean of the following numbers? 5, 6, 6, 7
6
6.5
5.5
8

8. (Lesson 4) What is the mean of the following numbers? 3, 3, 4, 4
4
3
3.5
5

9. (Lesson 5) The standard deviation, SD, of a set of numbers is the r.m.s. value of the _________ from the mean.
deviations
roots
squares
values

10. (Lesson 5) The SD can never be greater than 100.
false
true

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
33, 30
38, 35
33, 35

12. (Lesson 6) The mean and SD of a set of numbers is 20.0 and 5,respectively. Each number in the set is multiplied by 0. The new mean and SD is
0, 5
0, 0
20, 5
20, 0

13. (Lesson 7) The mean of a set of scores equals
the value where the deviation of all the numbers below the mean add up to equal the sum of the deviations above the mean.
the point where 50% of all the numbers are below the mean and 50% of the numbers are above the mean.

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

15. (Lesson 8) What is the median for the set of scores below? 2, 4, 6, 8, 15, 33, 56
7
8
56
15

16. (Lesson 8) What is the 75th percentile for the set of scores below? 2, 5, 6, 7, 9, 10, 23, 25, 55
24
25
23
6

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

18. (Lesson 9) That a set of scores is skewed to the right (toward higher scores) means that
the mean is lower than the median
the mean is greater than the median

19. (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
60
40
70
50

20. (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
30 %
45.5 %
50 %
40 %