Posted by fredia on Wednesday, February 9, 2011 at 9:12pm.
A family therapist states that all parents in America talk to their teenagers an average of 17 minutes per week. A psychologist decides to test this by collecting data from a sample of 9 parents on how much time they spend talking to their teenagers per week. Alpha .05, 2-tailed.
A. Give calculated score and critical score.
B. Do the psychologists data differ significantly from what the family therapist stated?
C. Is the family therapists claim an overestimate or an underestimate of actual time spent talking to children, compared to the sample size.
- statistics - PsyDAG, Thursday, February 10, 2011 at 9:02am
Calculate mean and standard deviation (SD) for your sample.
Z = (mean1 - mean2)/standard error (SE) of difference between means
SEdiff = √(SEmean1^2 + SEmean2^2)
SEm = SD/√(n-1)
If only one SD is provided, you can use just that to determine SEdiff.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.
Answer This Question
More Related Questions
- statistics - The average teenager spends 7.5 hours per week playing computer and...
- Statistics - Research Question for Parts 1 and 2: A health psychologist wants to...
- Art and Writing Therapist - I just have a few questions. Ok so the main point of...
- Statistics - 28. A group of statistics students decided to conduct a survey at ...
- Statistics - A student group claims that first-year students at a university ...
- Statistics - Please I Need Help With This Question Showing All Steps...Thank You...
- statistics - The number of hours per week that the television is turned on is ...
- statistics - To determine how many hours per week freshmen college students ...
- Statistics/probability/maths - Please I Need Help With This Question Showing ...
- Statistics - Suppose that the average grade for all people who take this course...