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 distribution of the population is normally distributed. 
a.State the null and alternative hypotheses.
b.Using a critical value, test the hypothesis at the 10% level of significance.
c.Using a p-value, test the hypothesis at the 10% level of significance.
d.Using a confidence interval, test the hypothesis at the 10% level of significance.
e.Could a Type II error have been committed in this hypothesis test?
Definitions:
Sales Estimates
Projections or predictions about the amount of revenue that will be generated through sales activities within a certain period.
Budgeted Sales
An estimate of the sales volume and revenue expected to be achieved in a specific period, typically used for planning purposes.
Units
A measure of quantity used to express the amount of a product or service.
Unit Selling Price
The amount charged to the customer for a single unit of a product or service.
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