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Discuss how a t Test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score.
Must the company replace old truck? If so which of new trunks must they use? Describe in detail.
How many units of capacity should be built to minimize the total cost of providing capacity plus lost sales?
Compute the 95% confidence and prediction intervals for values of y for X = 40. Determine correlation coefficient, Interpret.
Determine the point estimate and 95% confidence interval for the mean family dental expenses of all employees of the company.
A population has mean 325 and variance 144. Suppose the distribution of sample means is generated by random samples of size 36.
Please help me with the attached pre-calculus questions. Use mathematical induction to prove that 6 is a factor of n (n + 1)(n + 2).
A certain disease occurs in 35% of the population. A test for the disease is fairly accurate: it misclassifies people with the disease as healthy 6% of the time and reports that a healthy person is diseased just 7% of the time.
Describe a specific application of statistics that either has a direct effect on you or your life.
A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations are selected at random and scored. The test scores are 56, 85, 65, 86, and 93. At 98% confidence, ..
Use empirical Rule to evaluate proportion of costs within 2 standards deviations of mean. Write down these limits.
What is the standard deviation for the sample proportion? What is the probablily that in this group over 18% of the new cars will be found to have electrical problems?
Health and Nutrition Examination Survey, suppose that weights of men now are normally distributed with mean of m =172 pounds and standard deviation of s = 29 pounds.
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