QUESTION 5

1. "A researcher investigates whether or not a new cold medication disrupts mental alertness. It is known that scores on a standardized test containing a variety of problem-solving tasks are normally distributed with a mean of 25 and a standard deviation of 10. A random sample of 25 subjects are given the drug and then tested. For this sample, the mean is 30. The researcher tests to see if the mental alertness is different than the what is already known. The researcher does not have a specfic hypotheis. What is the test statistic? "

   		-2.5
   		2.5
   		-3
   		3

1 points

QUESTION 6

1. The z-statistic is 2 and you have a greater than research hypothesis. What is your p-value?

   		0.0228
   		0.2458
   		0.0132
   		0.0356

1 points

QUESTION 7

1. If the p-value is .11 and the alpha level is .10. You should?

   		Reject the null and do not find support for the research hypothesis.
   		Reject the null and find support for the research hypothesis.
   		Fail to reject the null and do not find support for the research hypothesis.
   		Fail to reject the null and find support for the research hypothesis.