In reference to the college students who participated in a learning community in Exercise 10. 36, a control group of students was also formed for testing and comparison. Ten randomly selected college students who were not involved in the learning community were given pre–self-esteem and post–self-esteem surveys. The scores on the surveys for the control group are as follows:
Does this sample of students show sufficient evidence that self-esteem scores were higher after participation in a learning community? Lower scores indicate higher selfesteem. Use the 0.05 level of significance and assume normality of scores.
Answer to relevant QuestionsTo test the effect of a physical-fitness course on one’s physical ability, the number of sit-ups that a person could do in 1 minute, both before and after the course, was recorded. Ten randomly selected participants scored ...Two independent random samples resulted in the following: Sample A: nA = 24 sA = 8.5 Sample B: nB = 21 sB = 11.3 Find the estimate for the standard error for the difference between two means. “Is the length of a steel bar affected by the heat treatment technique used?” This was the question being tested when the following data were collected. a. Find the means and standard deviations for the two sets of data. ...Determine the p-value for the following hypothesis tests for the difference between two means with population variances unknown. Many cheeses are produced in the shape of a wheel, and due to manufacturing inconsistencies, the amount of cheese, measured by weight, varies from wheel to wheel. Heidi Cembert wishes to determine if there is a significant ...
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