T / ( In simple linear regression, for a specific x, both y and ? follow a norma
ID: 3367026 • Letter: T
Question
T / ( In simple linear regression, for a specific x, both y and ? follow a normal distribution with variance ?2. TSampling variability refers to the way a parameter will vary from population to population. T F If two events are independent, then they are also disjoint. (f) / F If a 95% CI for ? is (42, 48), then 95% of the sample values are between 42 and 48. F A sample is a subset of a population. U The standard deviation of-5,-10,-15 is a positive number. / F «a T / ? The method of least squares chooses the line that makes the sum of the squares of the residuals as large as possible. The Central Limit Theorem states the distribution of X is normal for any sample size n. A 95% CI for ??--uz" (-4.5,-1.5) is used to test Ho.?.-H2 versus Ha: ?1 # ?2 at ?-0.05. T IF / F Based on the CI, we should reject Ho //F/ If a 95% CI for ? is (42, 48), then the margin of error is 6. T hl Cirrle the single best answer.Explanation / Answer
1. TRUE Both y and e are normally distributed in a simple regression.
2. FALSE Sampling variability refers to the way a parameter vary from sample to sample.
3. FALSE
4. TRUE
5. TRUE
6. TRUE, Standard deviation is 5
7. FALSE, It makes the sum of squares as small as possible
8. FALSE, Central limit theorem tells us that the distribution of mean of samples is normal.for larger n.
9. TRUE
10. FALSE, Margin of error is half the confidence interval which is 3
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