4. Fill out the table below:

x P(x) xP(x) X^2 X^2P(X)

0 0.10

1 0.30

2 0.60

Hint x p(x) means x times p(x) x^2 means square of x x^2 p(x) means x^2 times p(x)

5. Identify the population and the sample:

a). A survey of 2000 American households found that 99% of the households own a cellphone.

b). A recent survey of 3231 BMCC students found that 85% of the students took MAT150.

c). A survey will be given to 100 students randomly selected from all spring 2018 MAT150.5 sections at BMCC.

6. Determine whether the numerical value is a parameter or a statistic (and explain):

a). The mean income of all subscribers to a particular YouTube channel is $46000. We draw a random sample of 100 subscribers and find that their mean income is $47300.

b). In spring 2018, 10% of 28,000 BMCC students were international students. 20% of those international students were Asian.

7. Categorical or Quantitative? If Quantitative, Continuous or Discrete?

a). Subject of a Free OER textbook?

b). Number of pages in the textbook?

c). The weight of the textbook?

d). Number of letters on a page?

e). Color of the first page?

f). The length of the textbook?

8. Make a frequency distribution for the following data of inches of rainfall in Brooklyn per year, using 6 classes.

60 105 95 80 90 100 75 70 84 98 102 70

65 88 90 75 78 94 110 121 95 80 76 108

(a) Use the table to create a Frequency Table to simplify the data.

Inches of Rainfall per Year

Classes Class Boundaries Frequency Midpoint Relative Frequency Cumulative Frequency

(b) Create a histogram for the data. Include all labels.

9. The data represent the scores of a biology class on a midterm exam

75 85 90 80 87 71 82 88 95 91 73 80

83 92 94 71 75 91 79 95 87 76 91 85

(a) Use the table to create a Frequency Table to simplify the data, using 5 classes.

Scores on a midterm exam

Classes Class Boundaries Frequency Midpoint Relative Frequency Cumulative Frequency

(b) Create a histogram for the data. Include all labels