Jim's systolic blood pressure is a random variable with a mean of 145 mmHg and a standard deviation of 20 mmHg. For Jim's age group, 140 is the cutoff for high blood pressure.
If Jim's systolic blood pressure is taken at a randomly chosen moment, what is the probability that it will be, (Round your answers to 4 decimal places.)
(a) 135 or less?
(b) 175 or more?
(c) between 125 and 165?
3 answers
Statistics show that the sales force of a certain company successfully closed 468 sales out of 900 sales calls. What was their percent success rate?
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.
468/900 * 100 = ?
468/900 * 100 = ?
1 answer