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To evaluate the effect of a treatment, a sample of n = 6 is obtained from...

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Basic Math

To evaluate the effect of a treatment, a sample of n = 6 isobtained from a population with a mean of ? = 80 and the treatmentis administered to the individuals in the sample. After treatment,the sample mean is found to be M = 72. a. If the sample variance iss2 = 54, are the data sufficient to conclude that the treatment hasa significant effect using a two-tailed test with ? =0.05? b. Ifthe sample variance is s2 = 150, are the data sufficient toconclude that the treatment has a significant effect using atwo-tailed test with ? =0.05? c. Comparing your answers for parts aand b, how does the variability of the scores in the sampleinfluence the outcome of a hypothesis test?

Answer & Explanation Solved by verified expert
4.2 Ratings (812 Votes)
parta Given that population meanu80 sample mean x 72 standard deviation s sqrrt54 7348 number n6 null Ho 80 alternate H1 80 level of significance alpha 005 from standard normal table two tailed t alpha2 2571 since our test is twotailed    See Answer
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