This topic contains a solution. Click here to go to the answer

Author Question: A public bus company official claims that the mean waiting time for bus number 14 during peak hours ... (Read 53 times)

mcmcdaniel

  • Hero Member
  • *****
  • Posts: 550
A public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes.
 
  Karen took bus number 14 during peak hours on 18 different occasions. Her mean waiting time was 7.5 minutes with a standard deviation of 2.1 minutes. At the 0.01 significance level, test the claim that the mean is less than 10 minutes.

Question 2

A researcher wants to check the claim that convicted burglars spend an average of 18.7 months in jail.
 
  She takes a random sample of 11 such cases from court files and finds that = 20.6 months and s = 7.1 months. Test the null hypothesis that  = 18.7 at the 0.05 significance level.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mbcrismon

  • Sr. Member
  • ****
  • Posts: 328
Answer to Question 1

Test statistic: t = -5.05. Critical values: t = -2.567. Reject . There is sufficient evidence to support the claim that the mean is less than 10 minutes.

Answer to Question 2

Test statistic: t = 0.89. Critical values: t = 2.228. Fail to reject . There is not sufficient evidence to warrant rejection of the claim that the mean is 18.7 months.




mcmcdaniel

  • Member
  • Posts: 550
Reply 2 on: Aug 1, 2018
Excellent


aliotak

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Gracias!

 

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?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

For a complete list of videos, visit our video library