# Hours the company claims you decide to collect data

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hours the company claims. You decide to collect data on the average battery life (in hours) of a random sample of n = 20 batteries. Some of the information related to the hypothesis test is
presented below. Test of H 0 : 100 versus H 1 : 100 Sample mean 98.5 Std error of mean 0.777 Assuming the life length of batteries is normally distributed, if you wish to conduct this test using a .05 level of significance, what is the critical value that you should use? Place your answer, rounded to 3 decimal places in the blank. For example, -1.234 would be a legitimate entry. -1.729
Part 3 of 3 - 2.0/ 3.0 Points Question 18 of 20 1.0/ 1.0 Points A one-tailed alternative is one that is supported by evidence in either direction.
Question 19 of 20 1.0/ 1.0 Points If a null hypothesis about a population proportion p is rejected at the 0.025 level of significance, then it must also be rejected it at the 0.05 level.
Question 20 of 20 0.0/ 1.0 Points Using the confidence interval when conducting a two-tailed test for the population mean, we do
not reject the null hypothesis if the hypothesized value for falls between the lower and upper confidence limits. True False Answer Key: True