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brittany1903
30.03.2020 •
Mathematics
Suppose that your statistics professor tells you that the scores on a midterm exam were approximately normally distributed with a mean of 74 and a standard deviation of 7. The top 15% of all scores have been designated A's. Your score is 87. Did you receive an A
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Ответ:
Yes, you have received an A
Step-by-step explanation:
Mean grade (μ) = 74
Standard deviation (σ) = 7
The top 15% have to score at least at the 85th percentile of the normal distribution. The 85th percentile has a corresponding z-score of z =1.04.
The minimum grade X, that qualifies as an A is given by:
Since the requirement for an A is getting a grade higher than 81.28, and you got a score of 87, then you have received an A.
Ответ:
wow karen owns a place , not even gonna step foot into her seafood restaurant
Step-by-step explanation: