Question

Based on a poll, 60% of adults believe in reincarnation. Assume that 8 adults are randomly selected, and find the indicated probability.

A. What is the probability that exactly 7 of the selected adults believe in reincarnation?

b. What is the probability that all of the selected adults believe in reincarnation?

c. The probability that at least 7 of the selected adults believe in reincarnation?

d. If 8 adults are randomly selected, is 7 a significantly high number who believe in reincarnation? Why?

Answer #1

(a) The probability of believing in reincarnation, p=60% or 0.6.

The probability of non-believe, q=0.4.

The formula for binomial probability is given by,

(b).

(c)

(d) If 8 adults are randomly selected, 7 is not a significantly high number who believe in reincarnation because there is only 8.9% or 0.089 probability.

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