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Chapter 11: Q.16 (page 654)

Use the following information to answer the next nine exercise: The following data are real. the cumulative number of AIDS cases reported for Santa Clary Country is broken down by ethnicity as in table 11.29

The percentage of each ethnic group in Santa Clary Country is as in Table shown below

Hα:---

Short Answer

Expert verified

Hα:The ethnicity of the general population of Santa Clara County has no influence on the distribution of AIDS cases.

Step by step solution

01

Given Information  

The cumulative number of AIDS cases reported for Santa Clary Country is broken down by ethnicity as in table shown below :

The percentage of each ethnic group in Santa Clary Country is as in Table shown below

we have to determineHα

02

explanation 

For the given case, the alternative hypothesis is as follows:

Hα: The ethnicity of the general population of Santa Clara County has no influence on the distribution of AIDS cases.

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Most popular questions from this chapter

Do families and singles have the same distribution of cars? Use a level of significance of 0.05. Suppose that 100randomly selected families and 200randomly selected singles were asked what type of car they drove: sport, sedan, hatchback, truck, van/SUV. The results are shown in Table 11.20.Do families and singles have the same distribution of cars? Test at a level of significance of 0.05.

chi-square test statistic = ________

use a solution sheet to solve the hypothesis test problem. Go to Appendix E for the chi-square solution sheet. Round expected frequency to two decimal places car manufacturers are interested in whether there is a relationship between the size of the car an individual drives and the number of people in the driver’s family (that is, whether car size and family size are independent).To test this, suppose that 800car owners were randomly surveyed with the results in Table 11.44. Conduct a test of independence.

Family SizeSub & CompactMid-sizeFull-sizeVan & Truck
1
20
35
40
35
2
20
50
70
80
3-4
20
50
100
90
5+
20
30
70
70

Table 11.44

Determine the appropriate test to be used in the next three exercises.

An archeologist is calculating the distribution of the frequency of the number of artifacts she finds in a dig site. Based on

previous digs, the archeologist creates an expected distribution broken down by grid sections in the dig site. Once the site has been fully excavated, she compares the actual number of artifacts found in each grid section to see if her expectation was accurate.

The standard deviation of heights for students in a school is 0.81. A random sample of 50students is taken, and the standard deviation of heights of the sample is 0.96. A researcher in charge of the study believes the standard deviation of heights for the school is greater than 0.81.

To find the value ofdf.
See all solutions

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