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Estimate the probability of getting exactly 43 boys in 90 births.

Question 15 1 points Save

Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.A certain question on a test is answered correctly by 22% of the respondents. Estimate the probability that among the next 150 responses there will be at most 40 correct answers.Question 16 Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.A product is manufactured in batches of 120 and the overall rate of defects is 5%. Estimate the probability that a randomly selected batch contains more than 6 defects.

Question 17 Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.In one county the conviction rate for speeding is 85%. Estimate the probability that of the next 100 speeding summonses issued there will be at least 90 convictions.

Question 18 Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.Two percent of hair dryers produced in a certain plant are defective. Estimate the probability that of 10000 randomly selected hair dryers exactly 225 are defective.

Question 19 Use the normal distribution to approximate the desired probability.A coin is tossed 20 times. A person who claims to have extrasensory perception is asked to predict the outcome of each flip in advance. She predicts correctly on 14 tosses. What is the probability of being correct 14 or more times by guessing? Does this probability seem to verify her claim?

Question 20 Use the normal distribution to approximate the desired probability.

A coin is tossed 20 times. A person who claims to have extrasensory perception is asked to predict the outcome of each flip in advance. She predicts correctly on 16 tosses. What is the probability of being correct 16 or more times by guessing? Does this probability seem to verify her claim?