An adult has on average 52 liters of blood Assume the variab

An adult has on average 5.2 liters of blood. Assume the variable is normally distributed and has a standard deviation of 0.3. Find the percentage of people who have less than 5.4 liters of blood in their system. What is the z-score of 5.2?

Solution

Here mean is 5.2 and sd is 0.3. So z=(5.4-5.2)/0.3=0.667.

So P(z<=0.667)=0.2525. So 25.25% of people will have less than 5.4 litres of blood in their system.

Zscore of 5.2 will be 0 as mean is also 5.2