grocery store manager did a study to look at the relationship between the amount of time (in minutes) customers spend in the store and the amount of money (in dollars) they spend. The results of the survey are shown below.   Time 10 8 6 13 19 18 27 10 7 Money 58 25 41 51 84 81 87 45 15   Use the model to predict the amount of money spent by a customer who spends 11 minutes at the store. Dollars spent =______  (Please round your answer to the nearest whole number.)

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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A grocery store manager did a study to look at the relationship between the amount of time (in minutes) customers spend in the store and the amount of money (in dollars) they spend. The results of the survey are shown below.

 

Time 10 8 6 13 19 18 27 10 7
Money 58 25 41 51 84 81 87 45 15

 

  1. Use the model to predict the amount of money spent by a customer who spends 11 minutes at the store.
    Dollars spent =______  (Please round your answer to the nearest whole number.)  

  2. Interpret the slope of the regression line in the context of the question:  Please select an answer.
    • As x goes up, y goes up.
    • The slope has no practical meaning since you cannot predict what any individual customer will spend.
    • For every additional minute customers spend at the store, they tend to spend on averge $3.28 more money at the store.


  3. Interpret the y-intercept in the context of the question:
    • The y-intercept has no practical meaning for this study.
    • The best prediction for a customer who doesn't spend any time at the store is that the customer will spend $11.13.
    • If a customer spends no time at the store, then that customer will spend $11.13.
    • The average amount of money spent is predicted to be $11.13.
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