A Researcher Selects a Pair of Random Samples and Predicts

question 35

Short Answer

A researcher selects a pair of random samples and predicts beforehand that Group 1 will score higher than Group 2. The scores in Group 1 are 6, 7, 10, 9, 8. The scores in Group 2 are 3, 4, 9, 7, 5.
a. Find the t ratio
b. As a one-tail t, should Ho be rejected? If rejected, state the probability of the alpha error.
c. Do the two groups represent a single population?

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Definitions:

Inferior Good

A type of good for which demand decreases as the income of consumers increases, inversely related to the consumer's income.

Complementary Good

A product that is consumed with another product, where demand for one increases demand for the other.

Normal Good

A good for which demand increases as the income of consumers increases.

Supply Curve

The supply curve is a graphical representation showing the relationship between the quantity of a good that producers are willing to sell and the price of the good.