STATS 7 Lecture Notes - Lecture 8: Pooled Variance, Confidence Interval, Test Statistic
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Chapter 11, exercises 3, 46, 48, 52abcd, and 60a. Chapter 13, exercises 4, 8, 10, 14, 25, 37, 45, 49, 53abd, and 56. (use your calculator for all computations) It would be appropriate to use a procedure for two independent samples: it would be appropriate to use a procedure for paired data, it would be appropriate to use a procedure for paired data. The parameter of interest is the difference of the average heights between daughters and mothers: the average height of the daughters is 65. 8 inch. The average height of the mothers is 64. 4 inch. The pooled variance is 3. 75 and the pooled standard deviation is 1. 93649. The degree of freedom is 5+5-2 = 8. The 95% confidence interval is (65. 8-64. 4) (+/-) 2. 306(1. 93649)(sqrt(1/5 +1/5)) Independent samples are not related pairs, and one sample are not related to the measurements in the other sample. Since the 90% confidence interval is by 3. 1406 and 6. 8594 ounces.
