Question

A company with a fleet of 150 cars found that the emissions systems of 3 out of the 30 they tested failed to meet pollution control guidelines. Is this strong evidence that more than 20 % of the fleet might be out of​ compliance? Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed.

Answer 1

No.

Step-by-step explanation:

Given:

Total number of test(n) = 30

Percentage = 20% = 0.20

There is a condition in this situation which state that Positive test condition will greater than 10%.

The number of satisfaction :

n x Satisfaction percentage units:

30 x 0.20 = 6 , which is lesser then 10

The number of Non-satisfaction units:

n x (1 - Satisfaction percentage)

30 x (1 - 0.20)

30 x 0.80 = 24 , which is greater then 10

We should not go with the test because these results are different.