STAT TECH IN BUSINESS & ECON AC
STAT TECH IN BUSINESS & ECON AC
18th Edition
ISBN: 9781264731657
Author: Lind
Publisher: MCG
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Chapter 11, Problem 3SR

It is often useful for companies to know who their customers are and how they became customers. A credit card company is interested in whether the owner of the card applied for the card on his or her own or was contacted by a telemarketer. The company obtained the following sample information regarding end-of-the-month balances for the two groups.

Chapter 11, Problem 3SR, It is often useful for companies to know who their customers are and how they became customers. A

Is it reasonable to conclude the mean balance is larger for the credit card holders that were contacted by telemarketers than for those who applied on their own for the card? Assume the population standard deviations are not the same. Use the .05 significance level.

  1. (a) State the null hypothesis and the alternate hypothesis.
  2. (b) How many degrees of freedom are there?
  3. (c) What is the decision rule?
  4. (d) What is the value of the test statistic?
  5. (e) What is your decision regarding the null hypothesis?
  6. (f) Interpret the result.
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STAT TECH IN BUSINESS & ECON AC

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