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 146 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
Gracias!

ryhom

  • Member
  • Posts: 366
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

major themes major themes
Pectoralis major Pectoralis major
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 ...
Transcription and processing of the major ribosomal RNAs in eukaryotes Transcription and processing of the major ribosomal RNAs in eukaryotes
Vitamin D plays a major role in bone health Vitamin D plays a major role in bone health
Find the factor demand for labour and the amount of output it will produce. Show all ... Find the factor demand for labour and the amount of output it will produce. Show all ...
Video: Phases of an Action Potential - Resting Potential, Threshold, Rising, Falling, & Recovery Phases

For a complete list of videos, visit our video library