Author Question: In the last presidential election before the candidates began their major campaigns, the percentages ... (Read 100 times)

joblessjake

  • Hero Member
  • *****
  • Posts: 555
In the last presidential election before the candidates began their major campaigns, the percentages of registered voters who favored the various candidates were as follows: Registered Voters Percentages Republicans 34 Democrats 43 Independents 23 After the major campaigns began, a random sample of 400 voters showed that 172 favored the Republican candidate, 164 were in favor of the Democrat candidate, and 64 favored the Independent candidate. Use  = .01 to determine if the proportion of voters who favored the various candidates changed.

Question 2

In 1996, forty percent of the students at a major university were Business majors, 35 were Engineering majors and the rest of the students were majoring in other fields. In a random sample of 600 students from the same university taken in 1997, 200 were Business majors, 220 were Engineering majors, and the remaining students in the sample were majoring in other fields. At a 5 significance level, test to see if there has been a significant change in the proportions between 1996 and 1997.



karmakat49

  • Sr. Member
  • ****
  • Posts: 369
Answer to Question 1

Chi-square = 18.42 > 9.21; proportion has changed.

Answer to Question 2

Chi-square = 13.15 > 5.99; thus, reject H0and conclude there has been a significant change.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

For a complete list of videos, visit our video library