This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: In order to estimate the average time spent per student on the computer terminals at a local ... (Read 82 times)

krzymel

  • Hero Member
  • *****
  • Posts: 548
on: Jun 24, 2018
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
Reply #1 on: Jun 24, 2018
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
YES! Correct, THANKS for helping me on my review

debra928

  • Member
  • Posts: 342
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Electroencephalography (EEG). To perform the EEG, electrodes attached to the patient’s head pick up Electroencephalography (EEG). To perform the EEG, electrodes attached to the patient’s head pick up
Major moons of Uranus in order of increasing distance (left to right), at their proper relative size Major moons of Uranus in order of increasing distance (left to right), at their proper relative size
Time Slows Down Near Matter Time Slows Down Near Matter
A Recently Discovered Member of the Local Group A Recently Discovered Member of the Local Group
Route for administrative of local anesthesia Route for administrative of local anesthesia
Jim Croce - Time in a bottle - 1973 Jim Croce - Time in a bottle - 1973
Video: Complement Proteins Animation

For a complete list of videos, visit our video library