Reference no: EM132843748
A center for education statistics reported average mathematics achievement scores for eighth graders in 22 nations. The average scores for each nation are given below.
185
354
429
450
459
462
478
479
493
504
524
532
540
541
564
587
588
589
596
607
608
611
a) Find the? 5-number summary, the? IQR, the? mean, and the standard deviation of these national averages.
?b) Determine if the distribution of scores is symmetric or skewed and describe the middle? 50% of the scores.
Is the distribution of average math achievement scores symmetric or? skewed?
A. The distribution is? symmetric, because the mean and median are approximately equal and the quartiles are approximately the same distance from the mean.
B. The distribution is? skewed, because the mean and median are not approximately equal.
C. The distribution is? symmetric, because the mean and median are not approximately equal.
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