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

Author Question: A major department store chain is interested in estimating the mean amount its credit card customers ... (Read 128 times)

bobbysung

  • Hero Member
  • *****
  • Posts: 519
on: Jun 24, 2018
A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results: X = 50.50 and S = 20. Construct a 95 confidence interval for the mean amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
 
  A) 50.50  11.00 B) 50.50  10.12 C) 50.50  11.08 D) 50.50  9.09

Question 2

The amount of time necessary for assembly line workers to complete a product is a normal variable with a mean of 15 minutes and a standard deviation of 2 minutes. So, 15 of the products require more than ________ minutes for assembly.
 
  Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Eazy416

  • Sr. Member
  • ****
  • Posts: 360
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

17.0729 using Excel or 17.08


bobbysung

  • Member
  • Posts: 519
Reply 2 on: Jun 24, 2018
Wow, this really help

elyse44

  • Member
  • Posts: 319
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Major parts of a kidney Major parts of a kidney
In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
Instruct the patient to use an applicator to apply a small amount of stool in the appropriate boxes ... Instruct the patient to use an applicator to apply a small amount of stool in the appropriate boxes ...
Major Types of Hydrogen Bonds Found in Biomolecular Interactions Major Types of Hydrogen Bonds Found in Biomolecular Interactions
The growing peptide chain at the P site The growing peptide chain at the P site
Find derivative using chain rule Find derivative using chain rule
Video: Bone Growth and Remodeling

For a complete list of videos, visit our video library