psy 305 rsearch stratergy |

psy 305 rsearch stratergy | .

PSY 305 Assignment 1
1.A professor has been teaching statistics for many years.His records show that the overall mean for final exam scores is 85 with a standard deviation of 10.He believes that this year s class is superb to the previous classes.The mean for the 40 students is 90.

What is the null hypothesis?
What is the research hypothesis?
Is this a one or two tailed hypothesis?
Which test should you use? Why?
Calculate the appropriate statistical test.
What is the critical value for = .05?
What do you conclude?

2. A researcher gives a group of participants (n = 15) a memory technique to use.He finds that they remember on average 20 words (sample standard deviation = 3) while the average number of words remembered in the population is 15.

What is the null hypothesis?
What is the research hypothesis?
Is this a one or two tailed hypothesis?
Which test should you use?Why?
Calculate the appropriate statistical test.
What is the critical value for = .05?
What do you conclude?

3.What is the difference between a z-test and a t-test (i.e., when would you use each one)

Do you need a similar assignment done for you from scratch? We have qualified writers to help you. We assure you an A+ quality paper that is free from plagiarism. Order now for an Amazing Discount!
NB: We do not resell papers. Upon ordering, we do an original paper exclusively for you.

psy 305 rsearch stratergy |