Select Questions

Lessons 1 to 10

1. (Lesson 1) A gambler, using a hidden camera, recorded the results of a roulette wheel for 5000 spins. He hoped to discover that the results formed a ________ sequence.

random

systematic

2. (Lesson 1) If you were to roll a die and record the value of each roll, you would be creating what type of sequence?

systematic

random

3. (Lesson 2) What characteristic of people would you expect to have a normal distribution?

height

income

eye color

gender

4. (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 range of rain falls during the ten years.

the highest rain falls during the ten years.

the lowest rain falls during the ten years.

whether rain fall is increasing or decreasing over the 10 year period .

5. (Lesson 3) Divide the range of scores by 10. This is a rule of thumb for determining what?

estimating the median

computing the mean

number of intervals of a histogram

interval size of a histogram

6. (Lesson 3) Scores on a test range from 55 to 100. 200 students took the test. A good starting point for the histogram would be ____

7. (Lesson 4) What is the mean of the following numbers? 3, 3, 3

The mean does not exit

8. (Lesson 4) In an experiment evaluating a diet, the mean weight loss was 10.4 lb. This means that every person lost roughly 10.4 lb.

false

true

9. (Lesson 5) Which set of numbers has the greater SD? I: 10 20 II: 100 200

They are equal

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, 35

33, 30

38, 30

33, 35

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

40, 50

200, 15

200, 50

40, 10

13. (Lesson 7) The mean of a set of scores equals

the point where 50% of all the numbers are below the mean and 50% of the numbers are above the mean.

the value where the deviation of all the numbers below the mean add up to equal the sum of the deviations 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

68%

100%

50%

95%

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

5.5

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

17. (Lesson 9) The __________ is the balance point or center of gravity of a set of scores.

25th percentile

mean

standard deviation

median

18. (Lesson 9) The sum of the deviations less than the ______________ is equal to the sum of the deviations greater than the ____________.

median, median

mean, mean

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

20. (Lesson 10) A ______________ often is used to graphically illustrate the results of research using percents to illustrate various outcomes.

polygraph

histogram

pie chart