Calculate the effect sizes for the four studies for a two

Assignment Help Basic Statistics

Reference no: EM132397963

Problem 1

PROBLEM 1 Calculate the effect sizes for the four studies for a two tailed alpha at the .05 level.

PROBLEM 2 In a study, with a known population with a normal distribution, M(p)=0, S(p)=10, what is the predicted Effect Size for .01 level and sample sizes for a within group comparison.

Problem 2

A study tested the effects of science fiction movies on people’s belief in the supernatural. A scale was designed to measure the degree that a person believes in the supernatural (high scores indicate high levels of belief). Seven participants completed the scale before and after watching a popular science fiction movie. Participants’ scores are listed below. Assume that the researcher had reason to expect participants to believe less in the supernatural after watching the movie. Belief-in-Supernatural Scores, Before and After Watching Science Fiction Movie

A. Determine the hypothesis

B. Compute the table statistics

C. Calculate the t value

D. Determine the critical p values

E. Calculate the Confidence Intervals

F. Determine the Effect Power and Sample Size requirement

G. Interpret the Findings

Problem 3

A consumer researcher was asked to test a claim by a franchise swimming instruction program. Specifically, they claimed that they could teach the average 7-year-old to swim across an Olympic-size pool in less than 2 hours. The researcher arranged for eight randomly selected 7-year-old children to take instruction at this school and kept a careful record of how long it took each child.

The times (in minutes) were 60, 120, 110, 80, 70, 90, 100, and 130. What should the researcher conclude? Carry out a t test for a single sample (120 minutes is the “known” population mean) using the .01 significance level.

A. Determine the hypothesis

B. Compute the table statistics

C. Calculate the t value

D. Determine the critical p values

E. Calculate the Confidence Intervals

F. Determine the Effect Power and Sample Size requirement

G. Interpret the Findings

Attachment:- Chapter 7 Effect Size.rar

Reference no: EM132397963

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