Chapter 07, Section 7.6, Problem 066ab 7 Your answer is partially correct. Try again. A company makes auto batteries. They claim that 85% of their LL70 batteries are good for 70 months or longer. Assume that this claim is true. Let p be the proportion in a random sample of 60 such batteries that are good for 70 months or more. a. What is the probability that this sample proportion is within 0.04 of the population proportion? Round your answer to two decimal places. 0.6157 b. What is the probability that this sample proportion is less than the population proportion by 0.06 or more? Round your answer to two decimal places. 0.9099

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Chapter 07, Section 7.6, Problem 066ab
7 Your answer is partially correct. Try again.
A company makes auto batteries. They claim that 85% of their LL70 batteries are good for 70 months or longer. Assume that this claim is true. Let p be the proportion in a random sample of 60 such batteries that are good
for 70 months or more.
a. What is the probability that this sample proportion is within 0.04 of the population proportion?
Round your answer to two decimal places.
0.6157
b. What is the probability that this sample proportion is less than the population proportion by 0.06 or more?
Round your answer to two decimal places.
0.9099
Transcribed Image Text:Chapter 07, Section 7.6, Problem 066ab 7 Your answer is partially correct. Try again. A company makes auto batteries. They claim that 85% of their LL70 batteries are good for 70 months or longer. Assume that this claim is true. Let p be the proportion in a random sample of 60 such batteries that are good for 70 months or more. a. What is the probability that this sample proportion is within 0.04 of the population proportion? Round your answer to two decimal places. 0.6157 b. What is the probability that this sample proportion is less than the population proportion by 0.06 or more? Round your answer to two decimal places. 0.9099
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