What percentage of z-scores in the standard normal distribution are between z = -0.33 and z = 0.33?
a. 25.86%
b. 37.07%
c. 12.93%
d. 50.00%
What percentage of z-scores in the standard normal distribution are between z = -0.33 and z...
Suppose Z has standard normal distribution. What is P(Z < -0.44)? A.) 0.33 B.) -0.15 C.) 0.67 D.) 0.3446
Find the area, to the nearest thousandth, of the standard normal distribution between the given z-scores. z = 1.12 and z = 1.81
1. Under any normal distribution of scores, what percentage of the total area falls A. between the mean (μ) and a score value that lies one standard deviation (1σ) above the mean? B. between a score value that lies one standard deviation below the mean and a score value that lies one standard deviation above the mean? C. between the mean and a score value that lies +2σ above the mean? D. between a score value that lies −2σ below...
What proportion of a normal distribution is located between each of the following Z-score boundaries? a. z= -0.50 and z= +0.50 b. z=-0.90 and z= +0.90 c. z=-1.50 and z= 1.50 For a normal distribution with a mean of μ = 80 and a standard deviation of σ= 20, find the proportion of the population corresponding to each of the following. a. Scores greater than 85. b. Scores less than 100. c. Scores between 70 and 90. IQ test scores are standardized to produce a normal distribution with...
Suppose that a random variable ?z has a standard normal distribution. Use a standard normal table such as this one to determine the probability that ?z is between −0.67 and 0.33. Give your answer in decimal form, precise to at least three decimal places. ?(−0.67<?<0.33)=P(−0.67<z<0.33)=
Use the normal distribution of IQ scores, which has a mean of 85 and a standard deviation of 18, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. The percentage of scores between 40 and 130 is ______%. Full data set Standard score % Standard score % minus−3.0 0.13 0.1 53.98 minus−2.5 0.62 0.5 69.15 minus−2 2.28 0.9 81.59 minus−1.5 6.68 1 84.13 minus−1 15.87 1.5 93.32 minus−0.9 18.41 2...
Use the normal distribution of IQ scores, which has a mean of 125 and a standard deviation of 13, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. :: Click the icon to view the table. %. Percentage of scores greater than 99 is (Round to two decimal places as needed.) i Data Table Standard Scores and Percentiles for a Normal Distribution Full data set e Standard score % Standard...
1. A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values: a. A score that is 20 points above the mean. b. A score that is 10 points below the mean. c. A score that is 15 points above the mean. d. A score that is 30 points below the mean.
What percent of scores in a normal distribution will fall between the mean and -1 standard deviation?
Find the two standard scores Z-scores such that the middle 90% of a normal distribution is bounded by them. 0 - 1.735 and 1.735 0 -1.435 and 1.435 0 - 1.645 and 1.645 0 -1.245 and 1.245