The distribution of notes taken in a 100-person scale shows normal data. The average of the data is 67 points and the standard deviation is 12 points. Standard normal distribution is used. How many people are between 55-65 points? A - 35 B - 19 C - 24 D - 30 E - 28
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Step 1
For the lower bound of 55 points: z1 = (55 - 67) / 12 = -1 For the upper bound of 65 points: z2 = (65 - 67) / 12 = -0.1667 Show more…
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