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    Independent and Dependent Variables Problems

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    A large furniture store stations salespeople near its entrance to greet customers and offer assistance in shopping. The salespeople, who work on a commission basis, tell the customers their name and hand them a business card. A psychologist thinks that the salespersons' intrusiveness might cause customers to buy less furniture rather than more furniture. She convinces the store's management to let her study the issue. Customers are randomly selected to either receive or not receive a salesperson's offer of assistance
    immediately on entering the store. The amount of customers' purchases are then logged as they leave the store. Here are the data:
    Amount of Purchase, in U.S. Dollars
    Immediate Assistance No Assistance Unless Requested
    0 761
    2,274 0
    0 2,592
    0 0
    0 1,037
    362 0
    855 84
    0 0
    0 672
    1,273 0
    a. What are the independent and dependent variables in this study?
    b. State the null hypothesis and the directional (one-tailed) research hypothesis.
    c. Calculate t and compare it with the tabled critical t at the .01 and .05 ? levels.

    Can you reject the null hypothesis?

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    Solution Preview

    Please refer to the attachment.

    Subject: Statistics Topic: All Topics Level: Other
    Independent and dependent variables PROBLEMS
    Credit Value: 5 Deadline: September 19, 2011, 4:56 pm

    A large furniture store stations salespeople near its entrance to greet customers and offer assistance in shopping. The salespeople, who work on a commission basis, tell the customers their name and hand them a business card. A psychologist thinks that the salespersons' intrusiveness might cause customers to buy less furniture rather than more furniture. She convinces the store's management to let her study the issue. Customers are randomly selected to either receive or not receive a salesperson's offer of assistance immediately on entering the store. The amounts of customers' purchases are then logged as they leave the store. Here are the data:
    Amount of Purchase, in U.S. Dollars
    Immediate Assistance No Assistance Unless Requested
    0 ...

    Solution Summary

    Independent and dependent variable problems are examined in the solution.

    $2.19

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