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 fifty 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. Based on your decision, what is the conclusion of the test? A. We accept the null hypothesis and reject the alternative hypothesis
B. Data prove that the expected level is lower than 120 bpm
C. There is statistical evidence to conclude that the expected level is lower than 120 bpm.
D. There is no statistical evidence to conclude that the expected level is lower than 120 bpm.