Question

name
algebra 2b lep 5
comment:
lep checkpoint
statistics
assessment lep checkpoint
□ complete the following problems. show all your work. you will need a stat functions calculator. round
your answers to the nearest hundredth or as a percent where appropriate.
learning goal from lesson 22.1 how i did (circle one)
i can define statistics in terms of inferences, population parameters,
and random sampling. i got it! im still learning it.

1. the chef at a restaurant wants to get feedback on the quality of his food. which sampling method would most

likely not be biased? (1 point)
□ a. give an anonymous survey to cusion.ers at the restaurant who finished eating.
□ b. have the servers ask the custon.ers after giving them a discount on their food.
□ c. ask the chefs friends and family their thoughts on the chefs food.

1. a representative of a shoe store conducts a survey to determine what percentage of customers are interested

in buying a brand - new shoe being released next week. the representative randomly surveys 100 customers
leaving the store and finds out that 61 out of 100 customers are interested in buying the new shoe.
which of the following statements are true regarding the survey? select three that apply. (1 point)
□ a. the population parameter is the percentage of customers interested in buying the new shoe.
□ b. the results of the survey can be used to make inferences about all customers at the store.
□ c. the survey population is the entire store.
□ d. the survey sample is the 100 customers leaving the mall.

Explanation:

• Question 1:
• Option A: An anonymous survey to customers who finished eating is likely to be unbiased as it is a random sample of the relevant population (customers who have experienced the food).
• Option B: Having servers ask customers after giving a discount may introduce bias. Customers may be more likely to give positive feedback because of the discount, not the true quality of the food.
• Option C: Asking the chef's friends and family is biased. They may have a personal connection and be more likely to give positive feedback regardless of the actual quality.
• Question 2:
• Option A: The population parameter is indeed the percentage of all customers (the entire population of interest) interested in buying the new shoe. This is a correct statement.
• Option B: Since it is a random sample of 100 customers, the results can be used to make inferences about all customers at the store (assuming the sample is representative). This is a correct statement.
• Option C: The survey population is all customers at the store, not just the entire store (which is a physical place). This statement is incorrect.
• Option D: The survey sample is the 100 customers leaving the store (not the mall, assuming the store is in a mall). This statement is incorrect.

Answer:

1. A. Give an anonymous survey to customers at the restaurant who finished eating.
2. A. The population parameter is the percentage of customers interested in buying the new shoe; B. The results of the survey can be used to make inferences about all customers at the store.