In Testing the Difference Between Two Population Means Using Two

question 75

Multiple Choice

In testing the difference between two population means using two independent samples, under which of the following conditions would we use the pooled variance in estimating the standard error of the sampling distribution of the sample mean difference ?

• A) The sample sizes are both large.
• B) The populations are normal with equal variances.
• C) The populations are non-normal with unequal variances.

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Definitions:

Supply Curve

A graphical representation of the relationship between the price of a good and the quantity of the good that suppliers are willing and able to sell, with price typically on the vertical axis and quantity on the horizontal axis.

Horizontal Axis

The “left-right” or “west-east” measurement line on a graph or grid.

Equilibrium Quantity

The quantity of goods or services supplied and demanded at the equilibrium price, where supply equals demand.

Demand

The desire of purchasers, consumers, clients, or agents for a particular commodity, service, or other resource, combined with their capacity to purchase it.