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Artyom0805 [142]
3 years ago
7

In a study of 250 adults, the mean heart rate was 70 beats per minute. Assume the population of heart rates is known to be appro

ximately normal with a standard deviation of 12 beats per minute. What is the 99% confidence interval for the mean beats per minute?
68.9 − 76.3
70 − 72
61.2 − 72.8
68 − 72

Mathematics
1 answer:
alexira [117]3 years ago
3 0
Hello,
Please, see the attached file.
Thanks.

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The complete question is;

Five people buy individual insurance policies. According to the research, the probability of each of these people not filing a claim for at least 5 years is 2/3.

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Answer:

1) P(all 5 file no claim after 5 years) = 0.132

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Step-by-step explanation:

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Thus, for all 5 of them,

The probability will be;

P(all 5 file no claim after 5 years) = (2/3)^5 = 0.1317 ≈ 0.132

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Answer:

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Step-by-step explanation:

N___________________<u>M</u>_______O

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NO = MN + MO = 76 + 15 = 91

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