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Attempting to analyze the relationship between advertising and sales, the owner of a furniture store recorded the monthly advertising budget X (in $thousands) and the sales Y (in $millions) for a sample of 12 month. The data are listed here. (Please refer to the picture attached at the bottom.)
Estimate with 90% confidence the mean sales when advertising budget is 90000.
Hint: convert 90,000 to values in $thousands for X.Note:
[Please write down all the formula and create tables like on P40 of lecture 6a for computation, to receive full points.
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