True or false An alternate hypothesis is a statement about a population parameter that is accepted when the null hypothesis is rejected.

For a one-tailed hypothesis test, the criticalz-value of the test statistic is 2.45. Which of the following is true about the hypothesis test?

a) = 0.01 for an upper-tailed test

b) = 0.05 for a lower-tailed test

c) = 0.01 for a lower-tailed test

d) = 0.05 for an upper-tailed test

Consider a left-tailed test, where thep-value is found to be 0.10. If the sample sizenfor this test is 52, then thet-statistic will have a value of _______.

a)1.298

b) +1.676

c) 1.676

d) +1.298

A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is 15.1 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 14.1, 17.1, 18.1, 19.1, 16.1, 21.1, and 22.1 pounds. What is the sample mean?

a) 3.363

b) 13.133

c) 15.1

d) 18.2