Question 1168894: 20. What percentage of the area under the Standard Normal Curve (Z-distribution) falls between a z-score of 1.35 and the mean?
I GOT 41.15% AM I CORRECT?
21. All else being equal, the width of a 99% Confidence Interval will be wider than a 95% Confidence Interval. Is this statement true or false?
TRUE AM I CORRECT?
22. At the .05 level of significance (α = .05), how do the absolute values of the critical values of the t-distribution compare to those of the z-distribution when we are working with small samples (n=15 or less)?
(HINT: Are the values higher, lower, the same, or unable to be determined?)
NEED HELP
23. A researcher who misses out on discovering a significant effect by failing to reject the null hypothesis is committing what type of error?
TYPE 11 ERROR AM I CORRECT?
24. As the sample size decreases, the width of a 95% confidence interval increases, decreases, or remains the same (all else being equal)?
I GOT IECREASES AM I CORRECT?
25. Assuming alpha = .05, would we reject the null hypothesis or fail to reject the null hypothesis for a two-sided (non-directional) test if our observed z-statistic equals 2.13?
I GOT REJECT H0 AM I CORRECT?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! 20. yes
21. yes
22. the t-value are HIGHER or GREATER than the z-distribution
23. yes
24.the width INCREASES with smaller sample size (the sample size is in the denominator and when it is smaller the interval increased.
25. yes.
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