Question

Asked Oct 13, 2019

38 views

Step 1

a.

The mean of the distribution is ** 105** and it is obtained below:

The mean of the normal distribution represents the middle value in the distribution plot. In the given distribution plot, the middle value is 105. Hence, the mean of the distribution is 105.

Thus, the correct option is ** A. 105**.

Step 2

b.

The percentage of students whose blood pressure is less than 90 is ** 16%** and it is calculated below:

The correct option is __D. 16%.__

From the given information, let us define the random variable *X* as the blood pressure of students follows normal distribution with a mean 105 and standard deviation 15.

Step 3

c.

The percentage of students whose blood pressure is between 100 and 120 is **47%** and it is calculated b...

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