MATH 221 - Quizzes - Week 3 Homework

Question 1 2 pts

Let x represent the number of pets in pet stores. This would be considered what type of variable:

Discrete

Nonsensical

Continuous

Lagging

 

Question 2 2 pts

Let x represent sheets of paper in a package. This would be considered what type of variable:

Distributed

Continuous

Inferential

Discrete

 

Question 3 2 pts

Consider the following table.

Age Group Frequency

18-29           9831

30-39           7845

40-49           6869

50-59           6323

60-69           5410

70 and over 5279

If you created the probability distribution for these data, what would be the probability of 40-49?

16.5%

18.9%

23.7%

42.5%

 

Question 4 2 pts

Consider the following table.

Weekly hours   worked    Probability

1-30   (average=22)              0.08

31-40   (average=35)            0.16

41-50   (average=46)            0.72

51 and over   (average=61)  0.04

Find the mean of this variable.