The accompanying data represent the pulse rates (beats per minute) of nine students. Treat the nine students as a population. Compute the z-scores for all the students. Compute the mean and standard deviation of these z-scores. Click the icon to view the data table. Pulse Rates Compute the z-scores for all the students. Complete the table. Student Z-Score Student Z-Score Student 1 Student 6 Student 2 Student 7 Student Pulse Student 3 Student 8 Student 1 77 Student 4 Student 9 Student 2 60 Student 3 60 Student 5 Student 4 80 (Round to the nearest hundredth as needed.) Student 5 73 Student 6 80 Compute the mean of these z-scores. Student 7 80 The mean of the z-scores is |. (Round to the nearest tenth as needed.) Student 8 68 Compute the standard deviation of these z-scores. Student 9 73 The standard deviation of the z-scores is . (Round to the nearest tenth as needed.)

A simple data set has been provided to practice the basics of finding measures of variation. 2, 4, 8, 8 For the data​ set, determine the range and the sample standard deviation.

Find the mean for the following group of data items. 74, 71, 73, 66, 71, 77 The mean is 72. (Type an integer or a decimal.)

Use the Student Unit Load data.  Student Unit Load 3, 12, 6, 9, 6, 12, 15, 12, 7, 9, 3   Find the mean, median, mode, range, standard deviation and variance. Use the range rule-of-thumb to find significantly high and low scores. Write the 5-number summary. Find the z-score for x = 15 Is x = 15 unusual in terms of a z-score?

Find the variance and the standard deviation for the following numbers: 1, 5, 6, 8. Show all your work. Do not simplify fractions/products/similar.

Find the range, the standard deviation, and the variance for the given samples. Round non-integer results to the nearest tenth. 75, 58, 61, 63, 48, 96, 49, 82, 97

A company that supplies LP gas for heating keeps data on the low temperature for each day of each month. It sum-marizes these data by finding the mean, median, standard deviation and interquartile range. The company assumesthat people use the LP gas for heat when the temperature is below 70°, so it creates a second set of data by subtract-ing 70 from each daily low temperature. Which of the four summary statistics will change for this second data set?A) mean and median onlyB) mean and standard deviation onlyC) median and IQR onlyD) standard deviation and IQR onlyE) mean, median, standard deviation, and IQR

Find the range and standard deviation of the following set of data.   168​, 177​, 163​, 174​, 167​, 186​, 162

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?

The ages (in years) of a random sample of shoppers at a gaming store are shown. Determine the range, mean, variance, and standard deviation of the sample data set. 12, 20, 23, 15, 15, 18, 22, 17, 14, 15