ALGii Ch11 Review (11Q)

A normal distribution has mean of 35 and standard deviation of 6. Find the probability that a randomly selected x-value from the distribution is between 17 and 35.

• 50.15%

• 49.85%

• 50%

• 99.85%

Determine whether the histogram has a normal distribution.

• No

• Yes

A normal distribution has mean μ and standard deviation σ. An x-value is randomly selected from the distribution. Find P(μ−σ ≤ x ≤ μ).

• 50%

• 84%

• 34%

• 66%

In your high school, a survey of 182 seniors found that 89 of them watch more than 5 hours of TV each week. Identify the population and the sample.

• The population consists of the response of all students in your high school, and the sample consists of the responses of the 182 seniors in the survey.

• The population consists of the response of all seniors in your high school, and the sample consists of the responses of the 182 seniors in the survey.

• The population consists of the response of all seniors in your high school, and the sample consists of the responses of the 89 seniors in the survey.

• The population consists of the responses of the 182 seniors in the survey, and the sample consists of the responses of all seniors in your high school.

A survey of 8,250 teachers in the United States finds the standard deviation of the salaries earned is $6,169. Is the standard deviation of the salaries earned a parameter or a statistic?

• statistic

• parameter

Identify the type of sample described: The CEO of a company wants to determine whether employees are satisfied with their jobs. The CEO randomly surveys three employees from each department.

• cluster

• convenience

• self-selected

• stratified

• systematic

Identify the method of data collection: A gardener waters half of her flower bed and gives special plant food to the other half. The gardener then compares the flowers after five weeks and determines which method is better.

• simulation

• experiment

• observational study

• survey

Identify the method of data collection: A restaurant owner in a food court records whether people take free samples.

• simulation

• experiment

• observational study

• survey

Identify the method of data collection: An employee of a sport arena asks every sixth person that walks in to the arena whether they like the snacks at the concession stand.

• simulation

• experiment

• observational study

• survey

Identify the type of sample described: You want to determine whether students like the new healthy options for the school lunch. You place questionnaires in lockers and use the ones returned to you.

• cluster

• convenience

• self-selected

• stratified

• systematic