In the past Grades (G) of the police academy entrance exams in NYC was distributed normal with mean 66.5 and variance 100, G N(66.5, 100). Grades of 200 job applicants who took the test recently are distributed as follows: Grade: Under 49.5 49.5-59.5 59.5-69.5 69.5-79.5 79.5 and over Frequency: 22 38 56 50 34

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In the past Grades (G) of the police academy entrance exams in NYC was distributed normal with mean 66.5 and variance 100, G N(66.5, 100). Grades of 200 job applicants who took the test recently are distributed as follows:

Grade: Under 49.5 49.5-59.5 59.5-69.5 69.5-79.5 79.5 and over

Frequency: 22 38 56 50 34

Determine whether this data came from a normal distribution with mean 66.5 and variance of 100. 

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