Suppose that the mean weight for men 18 to 24 years old is 170 pounds, and the standard deviation is 20 pounds. In each part, find the value of the standardized score (z-score) for the given weight. (a) 206 pounds. Z= (b) 144 pounds. Z= (c) 170 pounds. Z= (d) 238 pounds. Z=

Scores on a test have a mean of 66 and a standard diviation of 9. Michelle has a score of 57. Convert Michelles score to z-score.

The mean grade in the Physics examination was 73 and the standard deviation was 8. Determine the following: a. The standard scores corresponding to a grade of 86.  b. This grade of the student whose standards score is -0.8

A quantitative data set as a mean of 24 and a standard deviation of 2. What percent of the observations lie between 16 and 32?

Note: The standard deviation is defined as the average distance of the class scores from the mean. Note: The variance is defined as average squared distance of the class scores from the mean. Sameer's score in a quiz was 25 and he was five standard deviations above the mean in this quiz. The mean was 20. The average squared distance of the scores from the mean in this quiz is: Select one: a. -3 b. 2 c. 3 d. -2 e. 1 f. -1

A study was commissioned to find the mean weight of the residents in certain town. The study found the mean weight to be 174 pounds with a margin of error of 7 pounds. Which of the following is a reasonable value for the true mean weight of the residents of the town?

Two teachers recorded test scores of a small group of students. What is the approximate difference in the standard deviations of the two teachers test scores? Bowman 69, 73, 79, 83, 93, 97, 98, 100 Gray 65, 70, 73, 75, 90, 93, 94, 95

for the data shown, answer the questions, round to 2 decimal places, 10.9,12.5,29.8,19.3,19.7,23.3,2.8,29.2,23.5. find the mean, median and the standard deviation.

Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?

Suppose you have already calculated the mean, the average deviation, and the standard deviation of the weights in pounds of 20 third-graders.  a. if these weights were converted to kilograms and the mean and the average deviation were once again calculated, would the second average deviation be (numerically) less than, greater than, or equal to the first average deviation? Explain your answer. b. If the standard deviation of these weights were calculated in kilograms, would it be (numerically) less than, greater than, or equal to the first standard deviation? Explain your answer