1)also find the test statistic from the give table. 2)find the p-value round you

Question

1)also find the test statistic from the give table.
2)find the p-value
round your answers to three decimal places as needed

Question Help In an experiment with 10 pairs of stores, the difference in the month's increased sales between the store that used coupons and the store with the outside poster had a mean of $2720. Use the output shown to test that the population mean difference is 0, carrying out the five steps of a significance test Make a decision using 0 0S significance level Test of mu= 0 vs mu # 0 Variable N Mean SIDev SE Sales 10 2120 4247 134302 Variable 95.0% Cl Sales (2715 427246) 2025 007353 State the assumptions for a significance test of a population mean The variable s quantitative, the data production employs randomization, and the population distribution is approximately normai The variable is categorical the data production employs randomization, and the population distribution is approximately normal C. The variable is quantitative and the population distribution is approximately normai State the null and alternative hypothesis Hg the population mean is zero H, the population mean is positive s the population mean is positive H, the population mean is zero H the popuiation mean is zero Ha the population mean is not zero Clith to select your answeris 02

Explanation / Answer

There is no mention that the pair of stores were selected randomly and the mean sales is a quantitative variable.

So, the correct option is C. The variable is quantitative and the population distribution is approximately normal.

The correct option is
C. H0: the population mean is zero. Ha : the population mean is not zero.

1. Test statistic = (observed mean - hypothesized mean)/SE = (2720-0)/1343.02 = 2.025

This value is also displayed in the output under the head T.

2. Degree of freedom, df = N-1 = 10-1 = 9

p-value of t=2.025 and df=9 is 0.0368

As this is a two tail test (have unequal sign in alternative hypothesis), p-value = 2 * 0.0368 = 0.0736

This value is also displayed in the output under the head P.

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