Chapter 10: Q. 56 (page 599)

Use the following information to answer the next twelve exercises. In the recent Census, three percent of the U.S. population reported being of two or more races. However, the percent varies tremendously from state to state. Suppose that two random surveys are conducted. In the first random survey, out of 1,000 North Dakotans, only nine people reported being of two or more races. In the second random survey, out of 500 Nevadans, 17 people reported being of two or more races. Conduct a hypothesis test to determine if the population percents are the same for the two states or if the percent for Nevada is statistically higher than for North Dakota.
Which distribution (normal or Student's t) would you use for this hypothesis test?

Short Answer

Expert verified

The proportions of the sample are assessed using a normal distribution in this hypothesis test.

Step by step solution

Given information

Three percent of the population of the United States reported being of two or more races in the most recent census. However, the percentage varies greatly from one state to the next. Assume two surveys are done at random. Only nine persons out of 1,000 North Dakotans claimed being of two or more races in the initial random survey. In the second random survey, 17 persons out of 500 Nevadans said they were of two or more races. Conduct a hypothesis test to see if the population percentages in the two states are the same or if Nevada's percentage is statistically higher than North Dakota's.