Assume the curve on the right is a distribution of scored on the last stat exam.

Question

Assume the curve on the right is a distribution of scored on the last stat exam. Mark the point where most people scored. On the distribution to the right mark the place that id the mean. Mark the place that has a standard score of 0. Mark the approximate interval between standard score of + 1 and write the percentage of all score between - 1 and + 1 Mark the approximate interval between standard score of + 2 -2 and write percentage of all scores between - 2 and +2. Mark the approximate interval between standard score of +3 and -3 and write percentage score that -3 and +3. What percentage of all the scores are above the standard score of +3? Use the 2 samples from the same population? The question is arc these samples from the same population?

Explanation / Answer

32) Mode is the central line

33) Mean, median , mode are the same central line due to symmetry

34) central line is the place where std score =0

35) 64.26%

36) 95.54%

37) 98.80%

38) 0.60%

39) H0: M1 = M2

alpha = 0.05

40) Ha: M1 not equal to M2

41) E(X^2) = 101+36+49+1 = 187

COMBINED MEAN = 29/6 = 4.84

std error = ({(187/6)-4.84^2}/6)1/2

= 1.136

42) t statistic = M1-M2/1.136

= (5-4.667)/1.136

= 0.2931

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