A random sample of 14 evenings at the OSullivan household sh

A random sample of 14 evenings at the O\"Sullivan household showed the family received an average of x= 2.4 solicitation phone calls each evening. The sample standard deviation was 0.9.  Find a 95% confidenceinterval for the population mean number of solicitation calls this family receives each night. Interpret the interval in the context of this problem.

Solution