A landscaping company claims that 90 of the trees they plant ...

[CQXA]

A landscaping company claims that 90 of the trees they plant survive (defined as being still alive one year from planting). If a tree does not survive, the company will replace the tree with a new one. A homeowner will have 5 trees planted in his yard by this landscaping company. Consider these 5 trees to be a random sample of all trees planted by this company. If the company's claim is correct, what is the probability that all 5 of the trees will survive?
 a. (0.1)5
  b. (0.9)5
  c. (0.1) + (0.1) + (0.1) + (0.1) + (0.1) = 0.5
  d. (0.9)

Question 2

Suppose that a 95 confidence interval for the proportion of teen drivers who were involved in a car accident is found to be (0.1425, 0.2875). What is the 90 confidence interval for the population proportion of teen drivers who were not involved in a car accident based on this data?

[Dunkey]

Answer to Question 1

B

Answer to Question 2

(0.724, 0.846)

[CQXA]

Thanks for the timely response, appreciate it

[mjenn52]

TYSM