Question

Assume that

31.4​%

of people have sleepwalked. Assume that in a random sample of

1491

​adults,

477

have sleepwalked.a. Assuming that the rate of

31.4​%

is​ correct, find the probability that

477

or more of the

1491

adults have sleepwalked.b. Is that result of

477

or more significantly​ high?c. What does the result suggest about the rate of

31.4​%?

a. Assuming that the rate of

31.4​%

is​ correct, the probability that

477

or more of the

1491

adults have sleepwalked is

nothing.

​(Round to four decimal places as​ needed.)

b. Is that result of

477

or more significantly​ high?

▼

Yes,

No,

because the probability of this event is

▼

greater

less

than the probability cutoff that corresponds to a significant​ event, which is

▼

0.5.

0.05.

0.95.

c. What does the result suggest about the rate of

31.4​%?

A.Since the result of

477

adults that have sleepwalked

is not

significantly​ high, it

is not

strong evidence against the assumed rate of

31.4​%.

B.Since the result of

477

adults that have sleepwalked

is

significantly​ high, it

is not

strong evidence against the assumed rate of

31.4​%.

C.Since the result of

477

adults that have sleepwalked

is not

significantly​ high, it

is

strong evidence against the assumed rate of

31.4​%.

D.

The results do not indicate anything about the​ scientist's assumption.

E.Since the result of

477

adults that have sleepwalked

is

significantly​ high, it

is

strong evidence against the assumed rate of

31.4​%.

F.Since the result of

477

adults that have sleepwalked

is not

significantly​ high, it

is not

strong evidence supporting the assumed rate of

31.4​%.

Answer 1