A random sample of 20 recent weddings in a country yielded a mean wedding cost of$26,390.62.

Assume that recent wedding costs in this country are normally distributed with a standard deviation of$7700.

Complete parts (a) through (c) below.

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Part 1

a. Determine a 95% confidence interval for the mean cost, , of all recent weddings in this country.

The 95% confidence interval is from $? to $?