Question

assume that blood pressure reading are normally distributed with a mean of 115 and a standard...

assume that blood pressure reading are normally distributed with a mean of 115 and a standard deviation of 4.9. If 34 people are randomly selected find the probability that their mean blood pressure will be less than 117

Homework Answers

Answer #1

Solution :

= / n = 4.9 / 34 = 0.8403

P( < 117) = P(( - ) / < (117 - 115) / 0.8403)

= P(z < 2.38)

= 0.9913

probability = 0.9913

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Assume that blood pressure readings are normally distributed with a mean of 122 and a standard...
Assume that blood pressure readings are normally distributed with a mean of 122 and a standard deviation of 6.4. If 64 people are randomly selected, find the probability that their mean blood pressure will be less than 124
Assume that blood pressure readings are normally distributed with a mean of 118 and a standard...
Assume that blood pressure readings are normally distributed with a mean of 118 and a standard deviation of 6.4 . If 64 people are randomly? selected, find the probability that their mean blood pressure will be less than 120 . Round to four decimal places.
Assume that blood pressure readings are normally distributed with a mean of 124 and a standard...
Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 8. If 100 people are randomly​ selected, find the probability that their mean blood pressure will be less than 126. Round to four decimal places. A. 0.9998 B. 0.0062 C. 0.8615 D. 0.9938
Assume that thermometer reading are normally distributed with a mean of 0°C and a standard deviation...
Assume that thermometer reading are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A thermometer is randomly selected and tested. (a) Find the probability of a reading less than -2.75. (b) Find the probability of a reading greater than 2.33 (c) Find the probability of a reading between -2.87 and 1.34 (d) Find the 96th percentile
Assume the reading on thermometer are normally distributed with a mean of 0 degrees and a...
Assume the reading on thermometer are normally distributed with a mean of 0 degrees and a standard deviation of 100 degrees. Find the probability that a randomly selected thermometer reads between -2.28 and -1.69 and draw a sketch of the region
7. IQ scores are normally distributed with a mean of 100 and a standard deviation of...
7. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15 points. a. Find the probability that a randomly selected person has an IQ less than 115. b. Find the probability that a randomly selected person has an IQ above 60. c. Find the 80th percentile for IQ scores. d. Find the probability that 20 randomly selected person has an IQ less than 110. e. What percentage of people have IQ scores between 60...
Suppose the systolic blood pressure of young adults is normally distributed with mean 120 and standard...
Suppose the systolic blood pressure of young adults is normally distributed with mean 120 and standard deviation 11. (a) Find the 77th percentile of this distribution. (b) Find the probability that a random young adult has systolic blood pressure above 135. (c) Find the probability that a random young adult has systolic blood pressure within 3.3 standard deviations of the mean. (d) Suppose you take a sample of 8 young adults and measure their average systolic blood pressure. Carefully jus-...
The systolic blood pressure X of adults in a region is normally distributed with mean 112...
The systolic blood pressure X of adults in a region is normally distributed with mean 112 mm Hg and standard deviation 15 mm Hg. A person is considered “prehypertensive” if his systolic blood pressure is between 120 and 130 mm Hg. Find the probability that the blood pressure of a randomly selected person is prehypertensive.
1. Assume that adults have IQ scores that are normally distributed with a mean of μ=100...
1. Assume that adults have IQ scores that are normally distributed with a mean of μ=100 and a standard deviation σ=15. Find the probability that a randomly selected adult has an IQ less than 130. 2. Assume the readings on thermometers are normally distributed with a mean of 0 °C and a standard deviation of 1.00 °C. Find the probability P=(−1.95<z<1.95), where z is the reading in degrees. 3. Women's heights are normally distributed with mean 63.3 in and standard...
Blood sugar readings are normally distributed with a mean of 100 and a standard deviation of...
Blood sugar readings are normally distributed with a mean of 100 and a standard deviation of 28. Suppose a sample of 196 people is randomly selected. Note: This is a sample mean situation. a) (2 points) What is the sample mean? b) (2 points) What is the sample standard deviation? c) (3 points) What is the probability that the blood sugar sample mean is between 97 and 103? d) (2 points) Compute the 33th percentile of the blood pressure sample...