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The regression equation between years of employment (X) and discount amount (Y) % at the Happy cafeteria is given by:
Y =3*X + 9
For how many years you need to be an employee in order to get a 25% discount.
Which is the correct answer
1. 9
2. more than 5.3
3. 12
4. more than 3
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Use the fact that the confidence interval for the mean is in the for x- E to x+ E to compute the sample mean and the mazimal margin of error E.
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