Question

It’s well established, we’ll assume, that lab rats require an average of 32 trials in a complex water maze before reaching a learning criterion of three consecutive errorless trials. To determine whether a mildly adverse stimulus has any effect on performance, a sample of seven lab rats were given a mild electrical shock just before each trial.

Question:	Steps:	Calculations or Logic:	Answer:
Given that X 5 34.89 and s 5 3.02, test the null hypothesis with t , using the .05 level of significance.	What is the research hypothesis?
	What is the null hypothesis?
	Is this a one-tailed or two-tailed test?
	What are the degrees of freedom?
	What is the t critical for .05 significance?
	What is the calculated t?
	Do you accept or reject the null hypothesis?
Construct a 95 percent confidence interval for the true number of trials required to learn the water maze.
Interpret this confidence interval.

Answer 1