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A recent article in Vitality magazine reported that the mean amount of leisure time per week for American men is 40.0 hours. You believe this figure is too large and decide to conduct your own test. In a random sample of 60 men, you find that the mean is 37.8 hours of leisure per week and that the standard deviation of the sample is 12.2 hours.
Can you conclude that the information in the article is untrue? Use the .05 significance level. Determine the p-value and explain its meaning.
Create Frequency Distribution of Sample Mean. Compute and Identifies Sampling Distribution of Sample Mean.
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
Adele Weiss manages the campus flower shop. Flowers must be ordered three days in advance from her supplier in Mexico. Advance sales are so small that Weiss has no way to estimate the demand for the red roses.
The daily numbers of calls received by the Internal Revenue Service office in July are shown below:
Clearly identify the independent and dependent variables you would study. Determine whether an independent-samples or related-samples t test is most appropriate and why. Generate the statistical null and alternative hypotheses.
A survey covering 0 different suburbs in Dallas found the average price of gasoline to be $3.924 per gallon with a population standard deviation of $0.053. What critical value shoiuld be used to test the claim using a = 0.01?
The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
In a simple linear regression analysis of 18 data points the following ANOVA table was found.
What is the standard error of measurement for the test? What range of scores would you expect an individual who made 54 on the test to make on another test of similar difficulty? Assume you want to be 68% accurate in your estimate.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national exercise rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and find..
Test to determine if there is a significant negative relationship between the independent and dependent variable at a = .05 and .01
Use the significance level of alpha = .05 to test claim that p > .5. Sample is simple random sample n = 50. Illustrate how to compute beta for test and suppose true population proportion is .6.
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