Independent random samples of professional football and basketball players gave the following information. Heights (in ft) of pro football players: x1; n1 = 45 6.33 6.50 6.50 6.25 6.50 6.33 6.25 6.17 6.42 6.33 6.42 6.58 6.08 6.58 6.50 6.42 6.25 6.67 5.91 6.00 5.83 6.00 5.83 5.08 6.75 5.83 6.17 5.75 6.00 5.75 6.50 5.83 5.91 5.67 6.00 6.08 6.17 6.58 6.50 6.25 6.33 5.25 6.66 6.50 5.82 Heights (in ft) of pro basketball players: x2; n2 = 40 6.09 6.57 6.25 6.58 6.25 5.92 7.00 6.41 6.75 6.25 6.00 6.92 6.82 6.58 6.41 6.67 6.67 5.75 6.25 6.25 6.50 6.00 6.92 6.25 6.42 6.58 6.58 6.08 6.75 6.50 6.83 6.08 6.92 6.00 6.33 6.50 6.58 6.83 6.50 6.58 (a) Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to three decimal places.) x1 = s1 = x2 = s2 = (b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 90% confidence interval for μ1 – μ2. (Round your answers to three decimal places.) lower limit upper limit
Independent random samples of professional football and basketball players gave the following information. Heights (in ft) of pro football players: x1; n1 = 45 6.33 6.50 6.50 6.25 6.50 6.33 6.25 6.17 6.42 6.33 6.42 6.58 6.08 6.58 6.50 6.42 6.25 6.67 5.91 6.00 5.83 6.00 5.83 5.08 6.75 5.83 6.17 5.75 6.00 5.75 6.50 5.83 5.91 5.67 6.00 6.08 6.17 6.58 6.50 6.25 6.33 5.25 6.66 6.50 5.82 Heights (in ft) of pro basketball players: x2; n2 = 40 6.09 6.57 6.25 6.58 6.25 5.92 7.00 6.41 6.75 6.25 6.00 6.92 6.82 6.58 6.41 6.67 6.67 5.75 6.25 6.25 6.50 6.00 6.92 6.25 6.42 6.58 6.58 6.08 6.75 6.50 6.83 6.08 6.92 6.00 6.33 6.50 6.58 6.83 6.50 6.58 (a) Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to three decimal places.) x1 = s1 = x2 = s2 = (b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 90% confidence interval for μ1 – μ2. (Round your answers to three decimal places.) lower limit upper limit
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
ChapterCSR: Contents Of Student Resources
Section: Chapter Questions
Problem 11.2EP
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Question
Independent random samples of professional football and basketball players gave the following information.
Heights (in ft) of pro football players: x1; n1 = 45
| 6.33 | 6.50 | 6.50 | 6.25 | 6.50 | 6.33 | 6.25 | 6.17 | 6.42 | 6.33 |
| 6.42 | 6.58 | 6.08 | 6.58 | 6.50 | 6.42 | 6.25 | 6.67 | 5.91 | 6.00 |
| 5.83 | 6.00 | 5.83 | 5.08 | 6.75 | 5.83 | 6.17 | 5.75 | 6.00 | 5.75 |
| 6.50 | 5.83 | 5.91 | 5.67 | 6.00 | 6.08 | 6.17 | 6.58 | 6.50 | 6.25 |
| 6.33 | 5.25 | 6.66 | 6.50 | 5.82 |
Heights (in ft) of pro basketball players: x2; n2 = 40
| 6.09 | 6.57 | 6.25 | 6.58 | 6.25 | 5.92 | 7.00 | 6.41 | 6.75 | 6.25 |
| 6.00 | 6.92 | 6.82 | 6.58 | 6.41 | 6.67 | 6.67 | 5.75 | 6.25 | 6.25 |
| 6.50 | 6.00 | 6.92 | 6.25 | 6.42 | 6.58 | 6.58 | 6.08 | 6.75 | 6.50 |
| 6.83 | 6.08 | 6.92 | 6.00 | 6.33 | 6.50 | 6.58 | 6.83 | 6.50 | 6.58 |
(a) Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to three decimal places.)
(b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 90% confidence interval for μ1 – μ2. (Round your answers to three decimal places.)
| x1 = | |
| s1 = | |
| x2 = | |
| s2 = |
(b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 90% confidence interval for μ1 – μ2. (Round your answers to three decimal places.)
| lower limit | |
| upper limit |
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