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Celsius and standard deviation

In a chemical experiment, a solution is to be kept at 70 degrees Celsius. At a randomly selected time, the actual temperature is a normal random variable with mean 70 degrees Celsius and standard deviation 0.4 degrees Celsius.

A) The middle 95% of time the temperature is between __ and __ ?

B) What is the 10th percentile?

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## Q : Coordinates of the five points

Recall the gas station example, where Y is the daily revenues from the gas station. Suppose a random sample of 5 days had the following daily revenues, $8500, $10000, $8000, $9750, $8700. You want to test whether Y is normally distributed. You wil