A typing school claims that in a six-week intensive course, it can train siudents to type, on the average, at least 60 words per minute. A random sample of 15 graduates is given a typing test and the median number of words per minute typed by each of these students is given below. Test the hypothesis that the median typing speed of graduates is at least 60 words per minute. Students Words per minute WPM-60 di A 81 +21 B 76 +16 53 - 7 71 +11 E 66 + 6 F 59 -1 88 +28 H 73 +13 80 +20 66 + 6 K 58 - 2 70 +10 M 60 N 56 - 4 55 - 5 S = 5

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