138k views
4 votes
Assume that blood pressure readings are normally distributed what the mean of 135 and a standard deviation of 4.8. If 35 people are randomly selected, find a probability that they’re mean blood pressure will be less than 137.

User Soltex
by
6.4k points

1 Answer

6 votes

Step 1

Given;


\begin{gathered} \mu=135 \\ \sigma=4.8 \\ X=137 \end{gathered}

Step 2

State the z-score formula


z=(x-\mu)/(\sigma)

Find the z-score


z=(137-135)/(4.8)
z=(5)/(12)

Step 3

Find the probability based on the z-score


undefined

User Ashutosh Chamoli
by
7.0k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.