Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. the management of a supermarket wanted to investig

The management of a supermarket wanted to investigate whether the male customers spend less money on...

60.1K

Verified Solution

Question

Statistics

The management of a supermarket wanted to investigate whetherthe male customers spend less money on average than femalecustomers. A sample of 22 male customers who shopped at thissupermarket showed that they spent an average of $73 with astandard deviation of $17.50. Another sample of 20 female customerswho shopped at the same supermarket showed that they spent anaverage of $87 with a standard deviation of $14.40. Assume that theamounts spent at this supermarket by all male and female customersare normally distributed with unequal and unknown populationstandard deviations.

a.) Construct a 90% confidence interval for the differencebetween the mean amounts spent by all male and all female customersat this supermarket.

b.) Using the 2.5% significance level, can you conclude that themean amount spent by all male customers at this supermarket is lessthan that by all female customers?

c) Interpret the conclusion obtained in part b.

Answer & Explanation Solved by verified expert
3.6 Ratings (586 Votes)
    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Finance
1.2K views

For small-business owners, it’s not worth the time or effort to secure intellectual property rights (Canadian...

Basic Math
1.2K views

Consider rotations R? and R? in R^2 . (a) From geometrical considerations, we know that R??R?...

Physics
1.2K views

Consider the condition shown in the figure Pulley is massless and frictionless springs are massless...

Basic Math
1.2K views

An office building contains 27 floors and has 37 offices on each floor How many...

Calculus
1.2K views

Problem 2 Suppose that a sequence is defined by san 2 an Problem 2 a...

Algebra
1.2K views

Rewrite the expression using the common denominator O 2x 3 O X x 3 L...

Accounting
1.2K views

Minnesota Company has no beginning and ending inventories, and has the following data about its...

Accounting
1.2K views

image

Accounting
1.2K views

Use the information below to prepare (a)...

Accounting
1.2K views

Assume a firm in a competitive industry is producing 2800 units of output, and it...

Accounting
1.2K views

Martin Jackson receives an hourly wage rate of $25, with time and a half for...

Accounting
1.2K views

Exercise 4-26 (Algorithmic) (LO. 4) Determine the taxable amount of Social Security benefits for the...