A sample of 40 people owned an average of 1.35 hats. It is known from a previous study that the population standard deviation of

Question

3 years ago

5

hat ownership is 0.63 hats. Construct a 95% confidence interval.

1 answer:

FrozenT [24] · Answer 1 · 2022-04-24T18:40:15+03:00

3 0

Answer:

(1,155, 1.545).

Step-by-step explanation:

From Normal distribution tables the z score for 95% CI = 1.96.

Confidence Interval

= 1.35 +/- 1.96 * 0.63/√40

= 1.35 +/- 0.195

= (1,155, 1.545).