Question

For the following settings, test the null hypothesis that theslope is zero versus the two-sided alternative....

For the following settings, test the null hypothesis that theslope is zero versus the two-sided alternative.

a. n=20, yˆ=28.5 + 1.4x, and SEb1= 0.65.

Also need to find the margin of error for a 95% confidence interval.

Math   Statistics-And-Probability   
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Answer #1

from above as test statistic is not in critical region ; we can not reject null hypothesis

we do not have sufficient evidence at 0.05 level to conclude that slope is zero

for 95% CI ; critical t=2.101

hence margin of error for a 95% confidence interval =t*std error=2.101*0.65 =1.366

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