3 10 Points Details Aswsbe14 11 Tb 1 011 My Notes Ask Your Teacher You May Need To Use The Appropriate Appendix T 1 (52.37 KiB) Viewed 24 times
3. [-/10 Points] DETAILS ASWSBE14 11. TB.1.011. MY NOTES ASK YOUR TEACHER You may need to use the appropriate appendix table or technology to answer this question. It is crucial that the variance (measured in min2) of a production process be less than or equal to 25. A sample of 23 is taken. The sample variance equaled 29. (a) Construct a 90% confidence interval for the population variance (in min2). (Round your answers to three decimal places.) min2 to min2 (b) Construct a 90% confidence interval for the population standard deviation (in min). (Round your answers to two decimal places.) min to min (c) State the null and alternative hypotheses to be tested (in min). (Enter != for # as needed.) Ho: Ha: (d) Compute the test statistic. (e) The null hypothesis is to be tested at the 10% level of significance. Using the critical value approach, state the decision rule for the test. (Round your answer(s) to three decimal places. If the test is one- tailed, enter NONE for the unused tail.) test statistics test statistic >
(f) What do you conclude about the population variance? Do not reject Ho. We can conclude that the population variance is greater than 25 min2. Reject Ho. We cannot conclude that the population variance is greater than 25 min2. We can conclude that the population variance is greater than 25 min2. Do not reject Ho. We cannot conclude that the population variance is greater than 25 min2. Reject Ho.
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