Would you say that the estimated fall in consumption

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Reference no: EM13319802

You are hired by the governor to study whether a tax on liquor has decreased average liquor consumption in your state. You are able to obtain, for a sample of individuals selected at random, the difference in liquor consumption (in ounces) for the years before and after the tax. For person i who is sampled randomly from the population, Yi denotes the change in liquor consumption. Treat these as a random sample from a Normal (µ, s2) distribution.

(i) The null hypothesis is that there was no change in average liquor consumption. State this formally in terms of µ.

(ii) The alternative is that there was a decline in liquor consumption; state the alternatives in terms of µ.

(iii) Now, suppose your sample size is n = 900 and you obtain the estimates y = -32.8 and s = 466.4. Calculate the test statistic for testing H0 against H1. Do you reject H0 at the 5% level? At the 1% level?

(iv) Would you say that the estimated fall in consumption is large in magnitude? Comment on the practical versus statistical significance of this estimate.

Reference no: EM13319802

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