Nancy believes that the average running time of movies is equal to 140 minutes.A sample of 4 movies was taken and the following running times (in minutes) were obtained.Assume the population of the running times is normally distributed. 
a.
Compute the sample mean and the standard deviation.
b.
State the null and alternative hypotheses.
c.
Using the critical value approach, test the hypotheses at the 10% level of significance.
d.
Using the p-value approach, test the hypotheses at the 10% level of significance.
Definitions:
Ml
Milliliter, a unit of volume in the metric system, equal to one thousandth of a liter.
Pt
An abbreviation for "patient," the individual receiving medical care or assessment.
C
A general-purpose programming language that provides constructs that map efficiently to typical machine instructions.
Metric Unit
A standard unit of measure in the International System of Units (SI), used globally for scientific and standard measurements.
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