A student compared organic food prices at Target and Whole Foods. The same items were priced at
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Whole 0.99 3.99 4.99 Food Target 0.79 Grape tomatoes/I Ib 4.49 4.49 Figure A Bananas/1 lb Russet potato/5 1b Paired T-Test and Cl: Target, Whole Paired T for TargetWhole Target Whole Difference 30 30 30 Mean 2.879 3.144 0.265 StDev 1.197 1.367 1.152 8R Mean 0.219 0.250 0.210 95% CI for mean difference: (-0.695 , 0.165) T-Test f mean difference = 0 {VB 0): T-Value = -1.26 P-Value0.217 Figure B Two-Sample T-Test and Cl: Target, Whole Two-aample T for Target vs Whole Target Whole 30 30 Mean 2.88 3.14 StDev 1.20 1.37 SE Mean 0.22 0.25 Difference(Target-Whole Eatimate for difference: 0.265 95% CI for difference (-0.930, 0.399} T-Test of difference = 0 (v8 ヌ 0): T-value -0.80 P-Value0.427 Figure C
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Introductory Statistics Exploring The World Through Data
ISBN: 9780321978271
2nd Edition
Authors: Robert Gould, Colleen Ryan
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