Question

please answer all questions 12-15

Question 12 2 pts The phrase statistically significant means that the op value associated with the test statistic is greater than the p level chosen o research finding is of practical importance o sample mean is larger than the population mean o data differ from what we would have expected by chance (if the null were true) Question 13 2 pts Garret thinks his car battery is becoming weak. He doesn't want to be stranded on the highway, so he tests his battery and it tests fine. But when Garret begins his trip on the highway, the battery dies 20 miles down the road. The test results must have been wrong! What type of error is this? Sampling o Type II o Confidence o Type Question 14 2 pts Researchers conducted an independent samples t-test and then reported a Cohen's d value for the test of 1.5. What is true of the two sample means? o The two samples likely come from the same distribution. o The two samples means are significantly different. o The two sample means overlap 85%. o The two sample means are 1.5 standard deviations apart. Question 15 2 pts To find the slope of a regression equation, you should Standardize the prediction for Y when X = 0 o Add the predicted change when X = 0 to the predicted. o subtract the predistedehange when X = 1 minus the o Find the predicted z score when x = 0.

Answer 1

12)

o data differ from what we would have expected by chance (if the null were true)

13)

14)

o The two sample means are 1.5 standard deviations apart.

15)

o subtract the predicted change when X = 1 minus the predicted changes when X=0.

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