# Question

a. For an exam given to a class, the students’ scores ranged from 35 to 98, with a mean of 74. Which of the following is the most realistic value for the standard deviation: −10, 1, 12, 60? Clearly explain what is unrealistic about the other values.

b. The sample mean for a data set equals 80. Which of the following is an impossible value for the standard deviation? 200, 0, −20? Why?

b. The sample mean for a data set equals 80. Which of the following is an impossible value for the standard deviation? 200, 0, −20? Why?

## Answer to relevant Questions

The pie chart (constructed using EXCEL) shown portrays the regional distribution of weather stations in the United States. a. Do the slices of the pie portray (i) variables or (ii) categories of a variable? b. Identify what ...How do cigarette taxes per pack vary from one state to the next? The data set of 2003 cigarette taxes for all 50 states and Washington, D.C. is in the Cigarette Tax data file on the text CD. a. Use software to construct a ...For each of the following variables, sketch a box plot that would be plausible. a. Exam score (min = 0 max = 100, mean = 87, standard deviation = 10) b. IQ mean = 100 and standard deviation = 16 c. Weekly religious ...To compare two groups graphically, one can use the same stems for each and put leaves for one group on one side and for the other group on the other side. This is called a back-to back stem-and-leaf plot. The figure shown ...We’ve seen that measures such as the mean, the range, and the standard deviation can be highly influenced by outliers. Explain why the range is worst in this sense.Post your question

0