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6. In 2019 the monthly rental rates for one-bedroom apartments in Wilmington, NC has a mean...

6. In 2019 the monthly rental rates for one-bedroom apartments in Wilmington, NC has a mean of $700. Suppose those rental rates have approximately a normal distribution, with a standard deviation of $150.

a. Find the approximate proportion of one-bedroom apartments for which the rental rates is at least $1100 a month. (4pd)

b. Find the approximate proportion of one-bedroom apartments for which the rental rates is between $515 and $905 a month. (4dp)

math   Statistics-And-Probability   
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