Simple Distribution

College Football: A stem-and-leaf plot for the number of touchdowns scored by all NCAA Division I Football Bowl Subdivision teams (120 total) is shown. If a team is selected at random, find the probability the team scored at least 59 touchdowns.

• 50.0%

• 11.7%

• 52.4%

• 99.3%

• 65.8%

-7(x + 3) 

• 7x + 21

• -7x - 21

• -7x + 21

• 7x - 3

Mult (2x + 3)(3x + 4)

• 6x² + 17x + 7

• 6x² + 17x + 12

• 6x² + 8x + 12

• 6x² + 9x + 12

n = 15

p = 0.25

x = 5

• 0.3135

• 0.8516

• 0.1651

• 0

Choose the correct x values for the following situation: "If Mrs. Ilg selects 10 cars, what is the probability that at most 5 of them are not in the correct parking spot."

• x = 5, 6, 7, 8, 9, 10

• x = 1, 2, 3, 4, 5

• x = 0, 1, 2, 3, 4, 5

• x = 0, 1, 2, 3, 4

Choose the correct x values for the following situation: "If Mrs. Ilg selects 10 cars, what is the probability that at least 5 of them are not in the correct parking spot."

• x = 5, 6, 7, 8, 9, 10

• x = 1, 2, 3, 4, 5

• x = 0, 1, 2, 3, 4, 5

• x = 0, 1, 2, 3, 4

Choose the correct x values for the following situation: "If Mrs. Ilg selects 10 cars, what is the probability that 1 to 5 of them are not in the correct parking spot."

• x = 5, 6, 7, 8, 9, 10

• x = 1, 2, 3, 4, 5

• x = 0, 1, 2, 3, 4, 5

• x = 0, 1, 2, 3, 4

The Gallup Poll asked a random sample of 1785 adults whether they attended church during the past week.  Let p-hat be the proportion of people in the sample who attended church.  A newspaper report claims that 40% of all U.S. adults went to church last week.  Suppose this claim is true. 
What is the mean of the sampling distribution of p-hat?

• 0.4

• 0.44

• 0.56

• 0.6

30% of all dogs in a city are micro-chipped. In a sample of 500 dogs, what is the probability that less than 140 dogs are micro-chipped? Select the closest option.

• 0.25

• 0.21

• 0.17

• 0.13

The mean and standard deviation of a population are 200 and 20, respectively. Sample size is 25. 
What is the standard deviation of the sampling distribution?

• 200

• 16

• 25

• 4