Cell Phone Call LengthsThe average local cell phone call length was reported to be2.11

minutes.A random sample of15

phone calls showed an average of2.81

minutesin length with a standard deviation of0.88

minute.At=

0.01

,can it be concluded that the average differs from the population average? Assume that the population is approximately normally distributed. Use a TI-83 Plus/TI-84 Plus calculator.

1) State the hypotheses and the claim

2) find P-Value

3) deny or do not deny null hypothesis

4) is there enough evidence to support or deny the claim