Question: = 1.75 + 0.25x a. Decide, at the 10% significance level, whether the data provide sufficient evidence to conclude that x is useful for predicting

= 1.75 + 0.25x

15 5 I 3 2 4

a. Decide, at the 10% significance level, whether the data provide sufficient evidence to conclude that x is useful for predicting y.
b. Find a 90% confidence interval for the slope of the population regression line.

15 5 I 3 2 4

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