Answered

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Does the frequency distribution given appear to be normal?
Score ---Frequency
65-69 4
70-74 5
75-79 6
80-84 4
85-89 6
90-94 4
95-99 5

Yes, the frequencies preceding the maximum are roughly a mirror image of those that follow the maximum
No, there is not a concentration of frequencies in the middle
Yes, there is symmetry in the distribution
No, the frequencies increase, reach a maximum, then decrease

Sagot :

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