For a normal distribution with a population of  μ = 54 and a standard deviation of σ = 12, find the proportion of the population corresponding to each of the following scores. a. Scores greater than 45. b. Scores less than 60. c. Scores between 36 and 60. d. Scores less than 24.

The blood pressure in millimeters was measured for a large sample of people. The average pressure is 140 mm, and the SD of the measurements is 20 mm. The histogram looks reasonably like a normal curv Use the normal curve to estimate the following percentages. Choose the answer that is closest to being correct. A 19.1% B 30.9% C 38.2% D 69.1% E 68.27% A The percentage of people with blood pressure between 130 and 150 mm. B The percentage of people with blood pressure between 140 and 150 mm. D The percentage of people with blood pressure over 150 mm.

For each of the following z-scores, sketch a normal distribution and draw a vertical line at the location of the z-score. Then, determine whether the body is to the right or the left of the z-score and find the proportion of the distribution located in the body. 7.2 z = 0.75 z = -0.67 а. z = -0.33 b. С. z = 1.96 d.

A normal distribution has a population mean of u = 90 and a standard deviation population of o =15. For each of the following scores, indicate whether the tail is to the right or left of the score and find the proportion of the distribution located in the tail. a. X 5 93 b. X 5 110 c. X 5 85 d. X 5

On an exam with μ = 52, you have a score of X = 56. Which value for the standard deviation would give you the highest position in the class distribution? Select one: a. cannot determine from the information given b. σ = 4 c. σ = 2 d. σ = 8

For bone density scores that are nomally distributed with a mean of 0 and a standard deviation of 1, find the percentage of scores that are a. significantly high (or at least 2 standard deviations above the mean). b. significantly low (or at least 2 standard deviations below the mean). c. not significant (or less than 2 standard deviations away from the mean). a. The percentage of bone density scores that are significantly high is %. (Round to two decimal places as needed.) b. The percentage of bone density scores that are significantly low is %. (Round to two decimal places as needed.) c. The percentage of bone density scores that are not significant is (Round to two decimal places as needed.) %.

Sketch the normal distribution with a. µ = -2 and σ = 2.b. µ = -2 and σ = 1/2.c. µ = 0 and σ = 2.

A normal distribution has mean 62.1 and standard deviation 2.42. Find the data value corresponding to the following value of z.   z= -1.33

2 If n=100, X = -20 , EX =220. Find standard deviation Select one: a. 2.1818 b. 2.2626 C. 1.477 d. 1.504