Sweetness of orange juice. Refer to the simple linear regression of sweetness index y and amount of

Question:

Sweetness of orange juice. Refer to the simple linear regression of sweetness index y and amount of pectin x for n = 24 orange juice samples, Exercise 11.26 (p. 660). A 90% confidence interval for the mean sweetness index, E(y), when x = 275 is shown on the StatCrunch printout below. Interpret this interval.

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