Two local post offices are interested in knowing the average number of Christmas cards that are mailed
Question:
a. Construct a 95% confidence interval for the difference in the average numbers of Christmas cards mailed by all households in these two towns.
b. Using a 10% significance level, can you conclude that the average number of Christmas cards mailed out by all households in Town A is different from the corresponding average for Town B?
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a df n 1 n 2 2 80 58 2 136 Since df 136 is very large we use the normal distribution to app...View the full answer
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