Nancy Believes That the Average Running Time of Movies Is

question 131

Essay

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.150
150
180
170
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.

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Definitions:

Nasogastric Tube

A flexible tube that is inserted through the nose into the stomach to deliver food and medicine or to remove stomach contents.

Ileus

A temporary cessation of bowel motility, leading to obstruction symptoms without a physical blockage in the intestines.

Peristalsis

The involuntary constriction and relaxation of the muscles in the intestine or another canal, creating wave-like movements that push contents forward.

Anemia

A condition in which there is a deficiency of red cells or of hemoglobin in the blood, leading to fatigue, weakness, and shortness of breath.