Solved: No Variation in a Sample An experiment was
Chapter 9, Problem 27(choose chapter or problem)
No Variation in a Sample An experiment was conducted to test the effects of alcohol.Researchers measured the breath alcohol levels for a treatment group of people who drank ethanol and another group given a placebo. The results are given below. Use a 0.05 significancelevel to test the claim that the two sample groups come from populations with thesame mean. The given results are based on data from Effects of Alcohol Intoxication on RiskTaking, Strategy, and Error Rate in Visuomotor Performance, by Streufert et al., Journal ofApplied Psychology, Vol. 77, No. 4.Treatment Group: n1 = 22, x1 = 0.049, s1 = 0.015Placebo Group: n2 = 22, x2 = 0.000, s2 = 0.000
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