HW- Chapter 13

# HW- Chapter 13 - Stat 22 Section 001 HW#3 Problem#13.13...

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Stat 22 – Section 001 HW #3 Problem #13.13 Step 1: H o (Null) Mu 1 = Mu 2 The mean number of minutes listening to the radio in group one is not significantly different to the mean of listening in group 2. H a (Alternative) Mu 1 = Mu 2 The mean number of minutes listening to the radio in group two is significantly different to the mean of listening in group one. Step 2: Alpha = .05 Two-Tail Test (Non-Directional Alternative Hypothesis) Rejection region would be in both tails, because it is a 2-tailed test, and the alternative hypothesis suggests the regions of rejection are on both sides of Mu. Decision Rule Using Tvalues: Reject the Null is Ttest is greater than +Talpha/2 (1.96) or, if Ttest is less than –Talpha/2 (-1.96). Decision Rule Using Pvalue: Reject the Null if Pvalue is less than alpha (.05). Step 3: t-Test: Two-Sample Assuming Equal Variances Group 1 Group 2 Mean 58.988 52.964 Variance 946.9677269 1876.43645 Observations 250 250 Pooled Variance 1411.702088 Hypothesized Mean Diff. 0 df

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HW- Chapter 13 - Stat 22 Section 001 HW#3 Problem#13.13...

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