The accompanying table describes the random variablex, the numbers of adults in groups of five who reported sleepwalking. Complete parts(a) through(d) below.

a. Find the probability of getting exactly 4 sleepwalkers among 5 adults.

First identify the appropriate value of x.

x=

b. Find the probability of getting 4 or more sleepwalkers among 5 adults.

c. Which probability is relevant for determining whether 4 is a significantly high number of sleepwalkers among 5adults: the result from part(a) or part(b)?

d. Is 4 a significantly high number of 4 sleepwalkers among 5adults? Why or whynot? Use 0.05 as the threshold for a significant event.

x	P(x)
0	0.169
1	0.35
2	0.304
3	0.134
4	0.035
5	0.008