In a study of
800 men,diastolic blood pressure was found to be approximately normally distributed, with a mean of 84 millimeters (mm) of mercury and standard deviation of 10 millimeters.
Use the 68-95-99.7% rule to determine what percentage of the test group had a diastolic pressure between 74 millimeters
and 94 millimeters of mercury.
4 answers
It is found that the number of raisins in a box of a popular cereal is normally distributed, with a mean of 133 raisins per box and a standard deviation of 10 raisins. My cereal box has 147 raisins. What is the z-score for this box of cereal?
68%
Jess is right for the first part.
Z = (score-mean)/SD
Insert the values and compute.
Z = (score-mean)/SD
Insert the values and compute.
Box of cereal--
You have a mean of 133 raisins with a standard deviation of 10. The cereal box has 147 raisins.
147-133=14
14/10 (Enter fourteen divided by 10 in the calculator)=1.4
The Z score is 1.4.
You have a mean of 133 raisins with a standard deviation of 10. The cereal box has 147 raisins.
147-133=14
14/10 (Enter fourteen divided by 10 in the calculator)=1.4
The Z score is 1.4.
1 answer