# Project #23448 - Statistics Quiz Standard Error and t-Test

Statistics Quiz-Standard Error and t-Test

Due in 45 minutes (see attachment)

### Question 1

1.
The primary contributor to the standard error of the difference between the means is the standard error of the means of the two populations.
 a. True. b. False.

### Question 2

1.
The region of rejection is in the tails of the distribution.
 a. True. b. False.

### Question 3

1.

As sample size increases, the level of t needed for statistical significance increases.

 a. True. b. False.

### Question 4

1.
If tabled t is 2.23 and calculated t is 2.24, the calculated t can be considered statistically significant.
 a. True. b. False.

### Question 5

1.
Assume a research report says t(43) = 2.37, α <0.02. For this study, confidence is <0.02.
 a. True. b. False.

### Question 6

1.
As sample sizes go up, the size of the sampling error of the difference between the means goes
 a. Up. b. Down. c. There is no way to predict what will happen.

### Question 7

1.
If the outcome of a test is statistically significant at the 0.05 level, what can be said about its statistical significance at the 0.01 level?
 a. It will also be significant at the 0.01 level. b. It will not be significant at the 0.01 level. c. It might or might not be significant at the 0.01 level. d. It will be less significant at the 0.01 level.

### Question 8

1.
Children whose parents smoke in their presence are more likely to develop asthma than children whose parents do not smoke in their presence. How many tails should be used when looking up the t test statistic for this study?
 a. One tail. b. Two tails. c. Either one tail or two tailsit does not matter. d. There is not enough information to tell.

### Question 9

1.
Which of these is the most important criterion when choosing a variable on which to match participants in a related-samples study?
 a. Ease of rating on that variable. b. The likelihood that the variable will be related to the dependent variable and so confound the study's results. c. The degree to which participants are likely to differ on that variable. d. Whether or not participants are willing to provide the information necessary to match on that variable.

### Question 10

1.
As the size of the population standard deviations go up, the size of the sampling error of the difference between the means goes
 a. Up. b. Down. c. There is no way to predict what will happen.

### Save and Submit

 Subject Mathematics Due By (Pacific Time) 02/22/2014 06:45 pm
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