ladybugys
05.03.2021 •
Mathematics
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 78 and a standard deviation of 7. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least four decimal places. (a) What proportion of the scores were above 90? (b) What proportion of the scores were below 64? (c) What is the probability that a randomly chosen score is between 64 and 84 ? Part 1 of 3 Your Answer is correct
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Ответ:
-12 and negative twelve?
Step-by-step explanation: