The mean and standard deviation of test scores are 80 and 5 respectively. Assuming a bell-shaped distribution, what percentage of test-takers scored above 90?
The mean and standard deviation of test scores are 80 and 5 respectively. Assuming a bell-shaped...
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 10. Use the empirical rule to determine the following (a) What percentage of people has an IQ score between 70 and 1307 (b) What percentage of people has an IQ score less than 90 or greater than 110? (c) What percentage of people has an IQ score greater than 120?
Suppose that IQ scores have a bell-shaped distribution with a mean of 101 and a standard deviation of 12. Using the empirical rule, what percentage of IQ scores are no more than125?
Scores of an IQ test have a bell-shaped distribution with a mean of 100100 and a standard deviation of 2020. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 8080 and 120120? (b) What percentage of people has an IQ score less than 4040 or greater than 160160? (c) What percentage of people has an IQ score greater than 160160?
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 16. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 84 and 116? (b) What percentage of people has an IQ score less than 68 or greater than 132? (c) What percentage of people has an IQ score greater than 148?
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 19. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 62 and 138? (b) What percentage of people has an IQ score less than 62 or greater than 138? (c) What percentage of people has an IQ score greater than 119?
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 17 . Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 66 and 134 ? (b) What percentage of people has an IQ score less than 49 or greater than 151 ? (c) What percentage of people has an IQ score greater than 151 ?
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 17 Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 83 and 117? (b) What percentage of people has an IQ score less than 66 or greater than 134? (c) What percentage of people has an IQ score greater than 134?
Suppose that IQ scores have a bell-shaped distribution with a mean of 105 and a standard deviation of 15. Using the empirical rule, what percentage of IQ scores are at least 120? Please do not round your answer.
Suppose that IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Using the empirical rule, what percentage of IQ scores are greater than 70? Please do not round your answer.
Suppose that IQ scores have a bell-shaped distribution with a mean of 9696 and a standard deviation of 1414. Using the empirical rule, what percentage of IQ scores are no more than 6868? Please do not round your answer.