scores represent the final examination grade for an elementary statistics course

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Q 1.      The following scores represent the final examination grade for an elementary statistics course: 

23	60	79	32	57	74	52	70	82	36
80	77	81	95	41	65	92	85	55	76
52	10	64	75	78	25	80	98	81	67
41	71	83	54	64	72	88	62	74	43
60	78	89	76	84	48	84	90	15	79
34	67	17	82	69	74	63	80	85	61

 Using 10 class intervals with the lowest starting at 10 – 19 :

a)       Set up a frequency distribution.

b)       Construct a cumulative frequency distribution.

c)       Construct a frequency histogram.

d)      Construct a smoothed cumulative frequency polygon.

e)       Estimate the number of people who made a score of at least 60 but less than 75.

 

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