7. A recent report states that 89% of Americans consider themselves above average drivers. A local newspaper is planning on conducting a survey to investigate whether this is true locally. If the newspaper assumes that the 89% claim is true and plans to use the normal approximation to calculate probabilities associated with their sample proportion, which sample size would be most appropriate

The available options are

A) 10

B) 11

C) 30

D) 91

E) The number depends on the size of the population.

91

Step-by-step explanation:

Given that for the normal approximation, we need that:

np > 5 and np(1-p) > 5

Hence, we have

n = 91

91*0.89 = 80.99

91*0.89*0.11 = 8.9089 > 5

Therefore the answer gotten is satisfactory or satisfies the condition, and which makes 91 the accurate solution.

The other options, when calculated is less than 5

it would take 7/10 of an hour too fill the pool.

step-by-step explanation:

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17