Chapter 10 Practice Problems - Ch10 1 The business manager of a local health clinic is interested in estimating the difference between the fees for

# Chapter 10 Practice Problems - Ch10 1 The business manager...

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Ch10 1. The business manager of a local health clinic is interested in estimating the difference between the fees for extended office visits in her center and the fees of a newly opened group practice. She gathered the following information regarding the two offices. Health Clinic Group Practice Sample Size 50 visits 45 visits Sample Mean \$21 \$19 Population Standard Deviation \$2.75 \$3.00 Develop a 95% confidence interval estimate for the difference between the average fees of the two offices. using 2-samplezint on ti-84 0.8384 < u1 – u2 < 3.1616 2. Independent random samples taken on two university campuses revealed the following information concerning the average amount of money spent on textbooks during the fall semester. University A University B Sample Size 50 40 Average Purchase \$260 \$250 Population Standard Deviation( ) \$20 \$23 We want to determine if, on the average, students at University A spent more on textbooks then the students at University B. a. Compute the test statistic. T=2.17
b. Compute the p -value. P-value = .015 c. What is your conclusion? Let = .05. Reject the null

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• Fall '14
• Statistics, SOLUTIONS, Study, Ch10, Confidence Intervals, Test Statistic, Pvalue, Hypothesis Test, Statistical hypothesis testing, Health Clinic, Vegetarian Journal