Question

Assume that 21.6​% of people have sleepwalked. Assume that in a random sample of 1487 ​adults, 359 have sleepwalked. a. Assuming that the rate of 21.6​% is​ correct, find the probability that 359 or more of the 1487 adults have sleepwalked. b. Is that result of 359 or more significantly​ high? c. What does the result suggest about the rate of 21.6​%?

Answer 1

a. The probability that 359 or more of 1487 adults sleepwalked is zero (0).

b. Yes, it's significantly higher than the 21.6% of people who sleepwalked.

c. The result suggests 321 adults.

Explanation:

a. The assumed 359 sleepwalked adults exceed the 21.6% correct rate. 359 sleepwalked adults give 24.1%.

b. Yes, it is significantly high because it's 24.1% instead of correctly assumed 21.6%.

c. 21.6% sleepwalked adults give 321.2 people. Hence, people can only be in whole of numbers. Therefore, it is 321 adults.