Question

2. Calculate one of each of the following questions created by 3 different classmates. a. Mean...

2. Calculate one of each of the following questions created by 3 different classmates.

a. Mean and standard deviation given, looking for the percentage between two x values.

Marks in a class is normally distributed with a mean mark of 71 and standard deviation of 11. 3

What percent of students scored between 65 - 75%?

b. Mean and standard deviation given, looking for the percentage above a certain x value.

The heights of 17-year-old boys' heights are normally distributed with a mean of 175cm and a standard deviation of 7.11cm.

What percent of the 17-year-old boys are above 179cm?

c. Mean and standard deviation given, looking for the x value at a certain percentile.

The length of time it takes for students who ride the bus to get to school is normally distributed with a mean of 25 mins and a standard deviation of 5 mins.

What time would be lower than 60% of all the other times?

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