http://www.ck12.org Chapter 8. Hypothesis Testing
Review Answers
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- True
- This scenario involves independent samples since we assume that the scores of one sample do not affect the
other.
4.H 0 :μ 1 =μ 2 ,Ha:μ 16 =μ 2
5.s^2 = 11. 09
6.sX ̄ 1 −X ̄ 1 = 1. 04 - The calculate test statistic is 2.69, which exceeds the critical value oft= 2 .021 scores above or below the
mean. Therefore, we would reject the null hypothesis and conclude that it is highly unlikely that the difference
between the means of the two samples occurred by chance.
8.H 0 :δ=μ 1 −μ 2 = 0 ,Ha:δ=μ 1 −μ 26 = 0
9.sd= 3. 15
10.sd ̄= 1. 11 - The calculated test statistic is 1.13 and with critical values set att= 2 .365 scores above or below the mean, we
fail to reject the null hypothesis. Therefore, we can conclude that the attitudes towards drinking for married
couples are dependent or related to each other.