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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

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

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