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A sample of 50 golfers showed that their average score on a particular golf course was 90 with a standard deviation of 6.
Answer each of the following (show all work):
(A) Find the 95% confidence interval of the mean score for all 50 golfers.(B) Find the 95% confidence interval of the mean score for all golfers if this is a sample of 80 golfers instead of a sample of 50.(C) Which confidence interval is smaller and why?
A random sample of 100 adult workers, 60 men and 40 women, is selected in a large Midwestern city. Of the group, 42 men and 17 women are union members.
If Molly and Kathleen wishes to make a profit of $5,000 for summer, how many pupils do they require to enrol?
If we assume that attention spans are normally distributed, find a 95% confidence interval for the mean attention span of children playing with this new toy. What is the lower limit of the confidence interval.
If Stephenson wishes to maximize its total market value, would you recommend that it issue debt or equity to finance the land purchase? Explain.
Suppose a random sample of 25 swatches are selected. What is the probability that the mean of the sample is less than 235 pounds per square inch.
Blood pressure measurements on adult males 30-39 years of age were obtained in a survey of a representative sample of Twin Cities households. To compare the frequency of hypertension in the white and non-white population surveyed, the most appropr..
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
A small pilot study is being conducted to determine the association between maternal age and birth weight. First, from all the single births in 2009 at Hospital X with mothers aged ? 20 years, we randomly selected 15 records.
A Pool Supply sells all types of billiard equipment, and is considering manufacturing their own brand of pool cues. Mysti Farris, the production manager, is currently investigating the production of a standard house pool cue that should be very po..
Determine the test sequence that minimizes the total expected cost of testing an item. Prove that your proposed sequence is optimal in minimizing the total expected cost of testing an item.
In order to determine the sum of squares the distance between each data point and the line of the best fit is squared and then all of the squares are summed up. The line of the best fit will minimize this value?
Does the regression equation account for a significant portion of the variance in GPA? Use ∝ = .05 to evaluate the F - ratio.
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