PRACTICE OF STATISTICS F/AP EXAM
6th Edition
ISBN: 9781319113339
Author: Starnes
Publisher: MAC HIGHER
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Question
Chapter 11.2, Problem 40E
To determine
To explain which treatment seems to be most effective and least effective.
Expert Solution & Answer
Answer to Problem 40E
The “Both” is most effective and “Placebo” is least effective treatment.
Explanation of Solution
Given:
| Having strock | Having no stroke | Total | ||
| Placebo | Observed | 250 | 1399 | 1649 |
| Expected | 205.81 | 1443.19 | 1649.00 | |
| (O - E)² / E | 9.49 | 1.35 | 10.84 | |
| Aspirin | Observed | 206 | 1443 | 1649 |
| Expected | 205.81 | 1443.19 | 1649.00 | |
| (O - E)² / E | 0.00 | 0.00 | 0.00 | |
| Dipyridamole | Observed | 211 | 1443 | 1654 |
| Expected | 206.44 | 1447.56 | 1654.00 | |
| (O - E)² / E | 0.10 | 0.01 | 0.12 | |
| Both | Observed | 157 | 1493 | 1650 |
| Expected | 205.94 | 1444.06 | 1650.00 | |
| (O - E)² / E | 11.63 | 1.66 | 13.29 | |
| Total | Observed | 824 | 5778 | 6602 |
| Expected | 824.00 | 5778.00 | 6602.00 | |
| (O - E)² / E | 21.22 | 3.03 | 24.24 | |
| 24.24 | chi-square | |||
| 3 | df | |||
| 2.22E-05 | p-value |
The treatment Both is most effective as the expected frequency 205.94 is higher than the observed frequency 157. That is the expected frequency deviates most from the observed frequency. The least effective treatment is Placebo as the expected frequency is lower than the observed frequency.
Chapter 11 Solutions
PRACTICE OF STATISTICS F/AP EXAM
Ch. 11.1 - Prob. 1ECh. 11.1 - Prob. 2ECh. 11.1 - Prob. 3ECh. 11.1 - Prob. 4ECh. 11.1 - Prob. 5ECh. 11.1 - Prob. 6ECh. 11.1 - Prob. 7ECh. 11.1 - Prob. 8ECh. 11.1 - Prob. 9ECh. 11.1 - Prob. 10E
Ch. 11.1 - Prob. 11ECh. 11.1 - Prob. 12ECh. 11.1 - Prob. 13ECh. 11.1 - Prob. 14ECh. 11.1 - Prob. 15ECh. 11.1 - Prob. 16ECh. 11.1 - Prob. 17ECh. 11.1 - Prob. 18ECh. 11.1 - Prob. 19ECh. 11.1 - Prob. 20ECh. 11.1 - Prob. 21ECh. 11.1 - Prob. 22ECh. 11.1 - Prob. 23ECh. 11.1 - Prob. 24ECh. 11.1 - Prob. 25ECh. 11.1 - Prob. 26ECh. 11.2 - Prob. 27ECh. 11.2 - Prob. 28ECh. 11.2 - Prob. 29ECh. 11.2 - Prob. 30ECh. 11.2 - Prob. 31ECh. 11.2 - Prob. 32ECh. 11.2 - Prob. 33ECh. 11.2 - Prob. 34ECh. 11.2 - Prob. 35ECh. 11.2 - Prob. 36ECh. 11.2 - Prob. 37ECh. 11.2 - Prob. 38ECh. 11.2 - Prob. 39ECh. 11.2 - Prob. 40ECh. 11.2 - Prob. 41ECh. 11.2 - Prob. 42ECh. 11.2 - Prob. 43ECh. 11.2 - Prob. 44ECh. 11.2 - Prob. 45ECh. 11.2 - Prob. 46ECh. 11.2 - Prob. 47ECh. 11.2 - Prob. 48ECh. 11.2 - Prob. 49ECh. 11.2 - Prob. 50ECh. 11.2 - Prob. 51ECh. 11.2 - Prob. 52ECh. 11.2 - Prob. 53ECh. 11.2 - Prob. 54ECh. 11.2 - Prob. 55ECh. 11.2 - Prob. 56ECh. 11.2 - Prob. 57ECh. 11.2 - Prob. 58ECh. 11.2 - Prob. 59ECh. 11.2 - Prob. 60ECh. 11.2 - Prob. 61ECh. 11.2 - Prob. 62ECh. 11.2 - Prob. 63ECh. 11.2 - Prob. 64ECh. 11 - Prob. R11.1RECh. 11 - Prob. R11.2RECh. 11 - Prob. R11.3RECh. 11 - Prob. R11.4RECh. 11 - Prob. R11.5RECh. 11 - Prob. T11.1SPTCh. 11 - Prob. T11.2SPTCh. 11 - Prob. T11.3SPTCh. 11 - Prob. T11.4SPTCh. 11 - Prob. T11.5SPTCh. 11 - Prob. T11.6SPTCh. 11 - Prob. T11.7SPTCh. 11 - Prob. T11.8SPTCh. 11 - Prob. T11.9SPTCh. 11 - Prob. T11.10SPTCh. 11 - Prob. T11.11SPTCh. 11 - Prob. T11.12SPTCh. 11 - Prob. T11.13SPT
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