An insurance company employs agents on a commission basis. It claims that in their first-year agents will earn a mean commission of at least $40,000 and that the population standard deviation is no more than $6,000. A random sample of nine agents found for commission in the first year,
where xi is measured in thousands of dollars and the population distribution can be assumed to be normal. Test, at the 5% level, the null hypothesis that the population mean is at least $40,000.
Answer to relevant QuestionsSupporters claim that a new windmill can generate an average of at least 800 kilowatts of power per day. Daily power generation for the windmill is assumed to be normally distributed with a standard deviation of 120 ...Of a random sample of 142 admissions counselors on college campuses 39 indicated that, on average, they spent 15 minutes or less studying each résumé. Test the null hypothesis that at most 20% of all admissions counselors ...A random sample is obtained from a population with variance σ2 = 625 and the sample mean is computed. Test the null hypothesis H0: μ = 100 versus the alternative hypothesis H1: μ > 100 with α = 0.05. Compute the critical ...The body mass index (variable BMI) provides an indication of a person's level of body fat as follows: healthy weight, 20-25; overweight, >25-30; obese, greater than 30. Excess body weight, is of course, related to diet, but, ...Test the hypotheses H0: Px – Py = 0 H1: Px – Py < 0 using the following statistics from random samples. a. p`x = 0.42, nx = 500; p`y = 0.50, ny = 600 b. p`x = 0.60, nx = 500; p`y = 0.64, ny = 600 c. p`x = 0.42, nx = ...
Post your question