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

Author Question: In order to estimate the average time spent per student on the computer terminals at a local ... (Read 85 times)

krzymel

  • Hero Member
  • *****
  • Posts: 548
In order to estimate the average time spent per student on the computer terminals at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours. If the sample mean is 9 hours, then the 95 confidence interval is
 a. 7.04 to 10.96 hours.
   b. 7.36 to 10.64 hours.
   c. 7.80 to 10.20 hours.
   d. 8.61 to 9.39 hours.

Question 2

In a sample of 400 people, 250 indicated that they prefer domestic wines, while 140 said they prefer European wines, and 10 indicated no preference. We want to use the sign test to determine if there is evidence of a significant difference in the preferences for the two types of wine. Hint: Use the continuity correction factor.
 a. Provide the hypotheses to be tested.
  b. Compute the mean.
  c. Compute the standard deviation.
  d.. At  = .05, test to determine if there is evidence of a significant difference in the preferences for the two types of wine.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ktidd

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

d

Answer to Question 2

a. H0: p = .5
Ha: p  .5
b. 195
c. 9.874
d.. Test Statistic z = 5.52; p-value < .05, therefore reject H0 and conclude that there is a significant difference in the preferences for the two types of wine.




krzymel

  • Member
  • Posts: 548
Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it


alexanderhamilton

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Excellent

 

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

For a complete list of videos, visit our video library