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: Ho = 120 versus H₁ μ< 120.

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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:
Ho = 120 versus Ha < 120.
What is the P-value for the one-sample t test for these hypotheses?
less than 0.01
O between 0.05 and 0.10
O between 0.01 and 0.05
O greater than 0.10
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: Ho = 120 versus Ha < 120. What is the P-value for the one-sample t test for these hypotheses? less than 0.01 O between 0.05 and 0.10 O between 0.01 and 0.05 O greater than 0.10
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