The following scores represent the final examination grades for an elementary statistics course:

Test the goodness of fit between the observed class frequencies and the corresponding expected frequencies of a normal distribution with μ = 65 and σ = 21, using a 0.05 level of significance.

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