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

Author Question: Suppose it is desired to estimate the average time a customer spends in a particular store to within ... (Read 80 times)

krzymel

  • Hero Member
  • *****
  • Posts: 548
Suppose it is desired to estimate the average time a customer spends in a particular store to within 5 minutes (e.g., + 5 minutes) at 99 reliability. It is estimated that the standard deviation of the times is 15 minutes.
 
  How large a sample should be taken to get the desired interval?
  A) n = 35 B) n = 299 C) n = 25 D) n = 60

Question 2

Suppose a company makes 4 different frozen dinners, and tests their ability to attract customers. They test the frozen dinners in 13 different stores in order to account for any extraneous sources of variation.
 
  The company records the number of customers who purchase each product at each store. What assumptions are necessary for the validity of the F statistic for comparing the response means of the 4 frozen dinners?
  A) The means of the observations corresponding to all the block-treatment combinations are equal, and the variances of all the probability distributions are equal.
  B) The probability distributions of observations corresponding to all the block-treatment combinations are normal, and the sampling distributions of the variances of all the block-treatment combinations are normally distributed.
  C) The probability distributions of observations corresponding to all the block-treatment combinations are normal, and the variances of all the probability distributions are equal.
  D) None. The Central Limit Theorem eliminates the need for any assumptions.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

meltdown117

  • Sr. Member
  • ****
  • Posts: 326
Answer to Question 1

D

Answer to Question 2

C




krzymel

  • Member
  • Posts: 548
Reply 2 on: Jul 24, 2018
:D TYSM


vickyvicksss

  • Member
  • Posts: 351
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

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?

Asthma cases in Americans are about 75% higher today than they were in 1980.

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?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

For a complete list of videos, visit our video library