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The marks in a chemistry course have a mean of 79

by | Dec 1, 2023 | Posted Questions

Consumer Mathematics

1. The marks in a chemistry course have a mean of 79 and a
standard deviation of 12. The marks in a biology course have a mean of 70 and a
standard deviation of 18. Emmanuelle has a mark of 90 in both classes. Which
mark do you consider to be a higher grade?

2. Researchers have observed that regular smokers have an
average lifespan that is normally distributed and is 68 years with a standard
deviation of 10 years. What percent of smokers will live beyond age 76?

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