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In a 1999 2000 longitudinal study of youth baseball, researchers found that 26% of 298 young pitchers complained of elbow pain after pitching.
a) Create a 90% confidence interval for the percentage of young players who may develop elbow pain after pitching.
b) A coach claims that only about 1 player in 5 is at risk of arm injury from pitching. Is this claim consistent with your confidence interval?
you need to test the alternative hypothesis that an average is greater than 70. if the population average is 70 and
1. When is the t-test statistic used in a hypothesis test for the difference between two means?
(a) Prepare to do this by generating 16 random integer numbers from the mixed congruential generator, xn+1 ≡ (5xn + 3) (modulo 16) and x0 = 1.
a. What ids the population? b. What is the sample? c. Is this a judgment sample of a probability sample?
Make a pie chart or other indicator that expresses the market position of your fictitious IS business in terms of its top five products or services.
an analyst is testing a two tail hypothesis to determine if the mean housing loan has changed from last years value of
a research assistant is asked to draw two independent normally distributed samples. the first sample x has a 10
Assuming these data are from two independent groups, calculate dfX, dfY, and dftotal for the data above. Determine the critical values for t based on the df you calculated for the question above, assuming a two-tailed test with a p level of 0.05.
A tank contains 1320L of pure water.A solution that contains .o1kg of sugar per liter enters a tank at the rate 3L/min The solution is mixed and drains from the tank at the same rate.
The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you reject your null hypothesis that all population means are equal or will you not reject?
The Rustbelt Manufacturing Company employs a maintenance crew to repair its machines as needed. Management now wants a simulation study done to analyze what the size of the crew should be, where the crew sizes under consideration are 2, 3, and 4.
Find the confidence interval of the true proportion of students to receive a 3.0 GPA. Find the Z score, standard error, range, and your conclusion in a sentence.
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