For a 95% confidence interval, what value will you use for t*? Group of answer choices 1.960 2.030 2.093 2.145 What is the standard error? Based on your 95% confidence interval, do you conclude that there is a difference in the average price of homes? Group of answer choices No. 0 is inside the interval, so we do not have evidence of a difference. No. 0 is not inside the interval, so we do not have evidence of a difference. Yes. 0 is inside the interval, so we have evidence of a difference. Yes. 0 is not inside the interval, so we have evidence of a difference If we had performed a t-test with the same data for a difference between population means, what can we say about the p-value before we even calculate the test statistic t? Group of answer choices The p-value would certainly be over 0.05 The p-value would certainly be less than 0.05 We cannot answer questions about the p-value without computing the test statistic first
A new suburban development offers two types of housing. Houses with a view of a nearby lake and houses with no view of the lake.
You take a random sample of different houses.
You sampled 15 houses that have lake views. The average cost of the houses with a view (in thousands of dollars) is 650 with a standard deviation of 80.
You sampled 20 houses that do not have views of the lake. The average cost of the houses with no view of the lake is 580 with a standard deviation of 70.
The following questions refer to a 95% confidence interval for the difference in average cost.
For a 95% confidence interval, what value will you use for t*?
1.960
2.030
2.093
2.145
What is the standard error?
Based on your 95% confidence interval, do you conclude that there is a difference in the average price of homes?
No. 0 is inside the interval, so we do not have evidence of a difference.
No. 0 is not inside the interval, so we do not have evidence of a difference.
Yes. 0 is inside the interval, so we have evidence of a difference.
Yes. 0 is not inside the interval, so we have evidence of a difference
If we had performed a t-test with the same data for a difference between population means, what can we say about the p-value before we even calculate the test statistic t?
The p-value would certainly be over 0.05
The p-value would certainly be less than 0.05
We cannot answer questions about the p-value without computing the test statistic first.
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