A poll found that 15% of adults do not work at all while on summer vacation. In a random sample of 8 adults, let x represent the number who do not work during summer vacation. Complete parts a through e. a. For this experiment, define the event that represents a "success." Choose the correct answer below. Adults not working during summer vacation O Adults working during summer vacation b. Explain why x is (approximately) a binomial random variable. Choose the correct answer below. O A. There are three possible outcomes on each trial. O B. The experiment consists of only identical trials. O C. The experiment consists of identical trials, there are only two possible outcomes on each trial (works or does not work), and the trials are independent. O D. The trials are not independent. c. Give the value of p for this binomial experiment. p=0.15 d. Find P(x 5). P(x = 5) = (Round to four decimal places as needed.) e. Find the probability that 2 or fewer of the 8 adults do not work during summer vacation. P(xs2) = (Round to four decimal places as needed.) Click to select your answer(s).

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A poll found that 15% of adults do not work at all while on summer vacation. In a random sample of 8 adults, let x represent the
number who do not work during summer vacation. Complete parts a through e.
a. For this experiment, define the event that represents a "success." Choose the correct answer below.
Adults not working during summer vacation
Adults working during summer vacation
b. Explain why x is (approximately) a binomial random variable. Choose the correct answer below.
A. There are three possible outcomes on each trial.
B. The experiment consists of only identical trials.
O C. The experiment consists of identical trials, there are only two possible outcomes on each trial (works or does not work),
and the trials are independent.
O D. The trials are not independent.
c. Give the value of p for this binomial experiment.
p=0.15
d. Find P(x 5).
P(x = 5) =
(Round to four decimal places as needed.)
e. Find the probability that 2 or fewer of the 8 adults do not work during summer vacation.
P(x<2) = (Round to four decimal places as needed.)
Click to select your answer(s).
Transcribed Image Text:A poll found that 15% of adults do not work at all while on summer vacation. In a random sample of 8 adults, let x represent the number who do not work during summer vacation. Complete parts a through e. a. For this experiment, define the event that represents a "success." Choose the correct answer below. Adults not working during summer vacation Adults working during summer vacation b. Explain why x is (approximately) a binomial random variable. Choose the correct answer below. A. There are three possible outcomes on each trial. B. The experiment consists of only identical trials. O C. The experiment consists of identical trials, there are only two possible outcomes on each trial (works or does not work), and the trials are independent. O D. The trials are not independent. c. Give the value of p for this binomial experiment. p=0.15 d. Find P(x 5). P(x = 5) = (Round to four decimal places as needed.) e. Find the probability that 2 or fewer of the 8 adults do not work during summer vacation. P(x<2) = (Round to four decimal places as needed.) Click to select your answer(s).
Expert Solution
Step 1

Given: A poll found that 15% adults do not work at all while on summer vacation. x is the random variable that represents the number who do not work during summer vacations.

a. Success is the event "Adults not working during summer vacation".

b. x is a random variable since the experiment consists of identical trials, there are only two possible outcomes on each trial (works or doesnt work) and the trials are independent.

c. The value of p in this binomial experiment is p=0.15.

 

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