Calculating mean and ss for sample of difference scores

Assignment Help Basic Statistics

Reference no: EM1319307

Q1) Researcher would like to find out if relaxation training will affect number of headaches for chronic headache sufferers. For week prior to training, each participant records number of headaches suffered. Participants then get relaxation training, and for week following training number of headaches are again measured. Change in number of headaches before and after training is as follows (minus signs indicate a reduction).

Difference scores: -5 -1 -4 -3 -6 -8 0 +1 -1

a) Calculate mean and SS for sample of difference scores.

b) Do results indicate a significant difference? Use two-tailed test with α = .05.

i) Yes, relaxation training has a significant effect.
ii) No, the relaxation training hasn't any significant effect.

c) Calculate r², percentage of variance accounted for, to measure size of the effect.

Reference no: EM1319307

Questions Cloud

Reason for choosing the test statistic : With the test statistic you chose, work out the problem with solution using .05 level of significance if it applies.

Which presents a modi solution for a transportation problem : According to table, which presents a MODI solution for a transportation problem, if that solution is used, which of the following is true.

Interviewing for chief information officer : XYZ is interviewing candidates for position of Chief Information Officer (CIO). They are inquiring the candidates to explain briefly how they could satisfy their requirements as described above. State how would a successful candidate respond to th..

Compute the profit during the one-week period : If there are 200 rooms also the operating costs $20,000 plus a cleaning fee of $5 per room per day, compute the profit during the one-week period.

Calculating mean and ss for sample of difference scores : Calculate mean and SS for sample of difference scores.

Assume you have a production technology : Assume you have a production technology to can be characterized by a learning curve.

Write the numeral number : Write the numeral number

Writing a memo to the president : Assume that you are the CFO for bell farm and Garden Equipment Co. Write a memo to the president explaining how omitting the entry on December 31, 2008.

Ecently hired an economist to work with engineering : You recently hired an economist to work with engineering also operations experts to estimate the production function for a particular line of office chairs.

User Account

All Pages