The distribution of number of children in the United States is normally distributed. It is found that the mean number of children is 2.3 with a standard deviation of 1.7. What percent of the Americans have more than 3 children?
The distribution of number of children in the United States is normally distributed
Suppose that the heights of adult women in the United States are normally distributed with a mean of 64.5 inches and a standard deviation of 2.3 inches. Jennifer is taller than 75 %of the population of U.S. women. How tall (in inches) is Jennifer? Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
in a countyof united states of heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 55.6 inches and standard deviation of 2.6 inches. A) What is the probabilty that a randomly chosen child has a height of less than 60.8 inches?______round three decimal places B) What is the probability that a randomly chosen child has a height of more than 48.7 inches?_______round three decimal places.
Suppose that the heights of adult men in the United States are normally distributed with a mean of 70 inches and a standard deviation of 3 inches. What proportion of the adult men in United States are less than 6 feet tall? (Hint: 6 feet 72 inches) Round your answer to at least four decimal places. X 5 ?
Systolic blood pressure readings in the United States are normally distributed with a mean of 120 and standard deviation of 15. Find the percentage of Americans with systolic blood pressure readings above 95. a. 4.75% b. 95.25% c. 4.85% d. 95.15%
the cholesterol level of men in the united states are normally distributed, with a mean = 215 milligrams per deciliter and a standard deviation = 25 milligrams per deciliter. if a man is randomly selected, what is the probability that his cholesterol level is more than 245? based on your answer to #1, would you consider it unusual for a man to have a cholesterol level of 245? Why? what cholesterol level cuts off the lower 10% of levels
1) The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting less than 250 days. 2) The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting more than 300 days. 3) An airline knows from experience that the distribution of the number...
Birth weights in the United States are normally distributed with a mean of 3420 grams and a standard deviation of 495 grams. If we randomly select 36 babies in the U.S., what is the probability that their mean (average) birth weight will be greater than 3500 grams?
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $32,000 and a standard deviation of $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.
In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 53.6 inches, and standard deviation of 3.4 inches. A) What is the probability that a randomly chosen child has a height of less than 50 inches? Answers (Round your answer to 3 decimal places.) B) What is the probability that a randomly chosen child has a height of more than 61.4 inches? Answers (Round your answer to 3...
In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 54.6 inches, and standard deviation of 7.7 inches. A) What is the probability that a randomly chosen child has a height of less than 40.05 inches? Answer= (Round your answer to 3 decimal places.) B) What is the probability that a randomly chosen child has a height of more than 36.1 inches? Answer= (Round your answer to 3...