Tanners think that 8^th graders who participate in theater after school are diff

Question

Tanners think that 8^th graders who participate in theater after school are different from the larger population of 8^th grade students in terms of reading ability. Tanner draws a random sample of sixty 8^th grade theater students and tests their reading achievement (M = 78, SD = 13). He obtains the population mean on this same reading test from a government website (M = 74), but the website does not report the population standard deviation. What test will Tanner have to use? A. Independent samples t-test B. One-sample t-test C. Multiple regression D. ANOVA E. Z-test If I observe a correlation coefficient of 1, what will the standard error of may regression estimate (S E_est) be/A. 0 B. 1 C. equal to the standard deviation of Y D. equal to the standard deviation of X E. None of the above The standard deviation of a set of z scores is A. the same as the standard deviation of the set of raw scores. B. always smaller than the standard deviation of the set of raw scores. C. 0 D. 1 E. None of the above A z-value indicates the distance of a raw score from the mean in what units? A. Standard deviations units. B. Raw score values C. x values D. Proportions of the range E. Deciles What percentage of a normal distribution occurs below z = 0? A. 0 B. 25 C. 50 D. 75 E. 100

Explanation / Answer

13:

Since populaiton standard deviation is unknown and we need to test populaiton mean so single sample t test will be used.

Option B is correct.

14:

It will be zero.

Option A is correct.

16:

Option A is correct.

17:

The area left z-score is 0.50 so 50% z-scores are below z=0.

Option C is correct.

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