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A doctor is interested in determining whether a film about exercise makes a significant difference in 10 persons' attitudes about exercise. The results of his questionnaire are shown. A higher numerical value shows a more favorable attitude toward exercise. Is there enough evidence to support the claim at level of significance 0.05, that there was a significant difference in change of attitude? Also find the 95% confidence for the mean difference.
Before 12 11 14 9 8 6 8 5 4 7
After 13 12 10 9 8 8 7 6 5 5
Several Independent Populations, Homogeneity of Proportions (chi-square distribution)
Assuming the scores follow a normal-shaped distribution, use the 68-95-99.7 rule to determine each of the following:
Write the 20 random numbers. For each number, write M under it if it represents a student randomized to the music group.
Below are fertility rates (average children born per woman) in 15 EU nations for 2 years. (a) Make a scatter plot. (b) Find the correlation coefficient and interpret it.
The data in the following table represents the total rate of reutrn in the value of stock of my company.
A company is creating 5 new divisions and 8 managers are eligible to be appointed head of a division. With 8 managers trying for 5 jobs, how could the five new heads be arranged?
A statistics practitioner working for major league baseball determined the probability that the hitter will be out on ground balls in 0.75. In a game where there are 20 ground balls, find the probability that all of them were outs.
Pet ownership among older adults.- Give a 95% confidence interval for the proportion of older adults in this population who are pet owners.
A study was conducted to determine whether a relationship existed between certain shareholder characteristics and the level of risk associated.
Suppose normality is not assumed. What nonparameiric test can be used to compare total heart weight of males with left-heart disease with that of normal males?
question heights of men on a baseball team have a bell-shaped distribution with a mean of 177cm and a standard
an automobile manufacturer would like to know what proportion of its customers are dissatisfied with the service
to test the hypothesis h0 ? 100 vs. h1 ? gt 100 a z-score of 2.8 is calculated. the value of 2.8 isa the test
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