1

The data table contains frequency distribution of the heights of the players in a basketball league.

a. Calculate the mean and standard deviation of this population.

b. What is the probability that a sample mean of

30

players will be less than

69

in.?

c. What is the probability that a sample mean of

30

players will be more than

70.5

in.?

d. What is the probability that a sample mean of

30

players will be between

69.5

and

71

in.?

view the data table of heights.

Full data set
Height (in.)
80	72	68
80	72	68
79	72	68
79	72	68
78	72	68
78	71	67
76	70	67
75	70	67
75	70	66
75	70	66
74	70	66
74	69	65
74	69	65
74	69	65
73	69	64
73	69	64
73	69	63
73	69	63
73	68	61
73	68	60

Question content area bottom

Part 1

a. The population mean is

enter your response here.

(Round to one decimal place as needed.)

2

For a population with a proportion equal to

0.27,

calculate the standard error of the proportion for the following sample sizes.

a) 40

b) 80

c) 120

Question content area bottom

Part 1

a)

p=enter your response here

(Round to four decimal places as needed.)

3

Generation Y has been defined as those individuals who were born between 1981 and 1991. A 2010 survey by a credit counseling foundation found that

56%

of the young adults in Generation Y pay their monthly bills on time) Suppose we take a random sample of

180

people from Generation Y. Complete parts a through e below.

Question content area bottom

Part 1

a. Calculate the standard error of the proportion.

p=enter your response here

(Round to four decimal places as needed.)

4

According to a recent survey,

74%

of teens ages 12-17 in a certain country used social networks in 2009. A random sample of

140

teenagers from this age group was selected. Complete parts a through d below.

Question content area bottom

Part 1

a. Calculate the standard error of the proportion.

p=enter your response here

(Round to four decimal places as needed.)

5

A college research group reported that

44%

of college students aged 18-24 would spend their spring breaks relaxing at home in 2009. A sample of

160

college students was selected. Complete parts a through d below.

Question content area bottom

Part 1

a. Calculate the standard error of the proportion.

p=enter your response here

(Round to four decimal places as needed.)