When engaging in weight-control (fitness/fat burning) types of exercise, a person is expected to attain approximately 60% of his or her maximum heart rate. For 20-year-olds, this rate is approximately 120 bpm. A simple random sample of one hundred 20-year-olds was taken, and the sample mean was found to be 107 bpm, with a standard deviation of 45 bpm. Researchers wonder if this is evidence to conclude that the expected level is actually lower than 120 bpm. To determine this, we test the hypotheses: Но : и — 120 versus Ha :и < 120. A 95% confidence interval for the population mean weight control heart rate, µ, of 20-year-olds was found to be (98.1, 115.9). Which of the statements is the correct interpretation for this confidence interval? We are 95% confident that the population mean duration is between 98.1 and 115.9 bpm. There is a 95% chance that a randomly selected individual from this population would give a response between 98.1 and 115.9 bpm. There is a 95% chance that the mean duration of another random sample from this population would be between 98.1 and 115.9 bpm. We are 95% confident that the sample mean duration is between 98.1 and 115.9 bpm.
When engaging in weight-control (fitness/fat burning) types of exercise, a person is expected to attain approximately 60% of his or her maximum heart rate. For 20-year-olds, this rate is approximately 120 bpm. A simple random sample of one hundred 20-year-olds was taken, and the sample mean was found to be 107 bpm, with a standard deviation of 45 bpm. Researchers wonder if this is evidence to conclude that the expected level is actually lower than 120 bpm. To determine this, we test the hypotheses: Но : и — 120 versus Ha :и < 120. A 95% confidence interval for the population mean weight control heart rate, µ, of 20-year-olds was found to be (98.1, 115.9). Which of the statements is the correct interpretation for this confidence interval? We are 95% confident that the population mean duration is between 98.1 and 115.9 bpm. There is a 95% chance that a randomly selected individual from this population would give a response between 98.1 and 115.9 bpm. There is a 95% chance that the mean duration of another random sample from this population would be between 98.1 and 115.9 bpm. We are 95% confident that the sample mean duration is between 98.1 and 115.9 bpm.
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Transcribed Image Text:When engaging in weight-control (fitness/fat burning) types of exercise, a person is expected to attain approximately 60% of his
or her maximum heart rate. For 20-year-olds, this rate is approximately 120 bpm. A simple random sample of one hundred
20-year-olds was taken, and the sample mean was found to be 107 bpm, with a standard deviation of 45 bpm. Researchers
wonder if this is evidence to conclude that the expected level is actually lower than 120 bpm. To determine this, we test the
hypotheses:
Но : и
120 versus Ha : µ < 120.
%|
A 95% confidence interval for the population mean weight control heart rate, u, of 20-year-olds was found to be (98.1, 115.9).
Which of the statements is the correct interpretation for this confidence interval?
We are 95% confident that the population mean duration is between 98.1 and 115.9 bpm.
There is a 95% chance that a randomly selected individual from this population would give a response between 98.1 and
115.9 bpm.
There is a 95% chance that the mean duration of another random sample from this population would be between 98.1
and 115.9 bpm.
We are 95% confident that the sample mean duration is between 98.1 and 115.9 bpm.
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