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 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:
Supply
The total amount of a product or service that is available for purchase at any given price level in a market.
Samsung
A multinational conglomerate corporation based in South Korea, known for its electronics, appliances, and technology products.
Quantity
The amount or number of a material or immaterial good or service.
iPads
A brand of tablet computers designed and marketed by Apple Inc., known for their touch screen interface and mobile operating system.
Q14: Refer to Exhibit 6-7. What percentage of
Q18: In the last presidential election, before the
Q19: A sample of 225 elements from
Q21: Refer to Exhibit 9-8. The value of
Q37: Refer to Exhibit 12-5. The MSE is<br>A)0<br>B)-1<br>C)1<br>D)0.5
Q72: Refer to Exhibit 9-3. The p-value is
Q109: The Highway Safety Department wants to study
Q128: When developing an interval estimate for the
Q133: Compared to the confidence interval estimate for
Q184: For testing the following hypothesis at