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A questionnaire for measuring executive stress levels has been developed. According to this test, a score...

A questionnaire for measuring executive stress levels has been developed. According to this test, a score above 80 indicates stress at a dangerous level. A random sample of 15 executives revealed the following stress level scores: a. What is the point estimate of the population mean? Name what it is, calculate and report it. b. Construct a 95% confidence level for the population mean. (Use a t-value of 2.145) c. Is it reasonable to conclude that executives have a mean stress level in the dangerous level, according to this test?

92 72 98 70 81 100 93 87 85 87 92 79 84 86 96

math   Statistics-And-Probability   
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