Exam 3: Central Tendency and Variability

For the following problems, consider this frequency table of survey data: F rel. f cum. f 2 0.15 0.15 3 0.23 0.38 3 0.31 0.69 4 0.23 0.92 1 0.08 1.00 -What is the standard deviation of the sample described by this frequency table?

For the following data, x² = 36: 1, 2, 3

Identify the order of measures of central tendency from least precise to most precise.

The sales manager recently collected a dataset containing the number of days that it took each employees to make his/her first sale after being hired. This dataset appears below. Use it to respond to Questions . For all problems, show work. Days 26 23 34 21 31 31 33 27 25 13 -Calculate the mean of this sample.

Determine the range for the following survey data: 4, 3, 4, 3, 3, 2, 4, 3, 4, 2

You should only use the mean when your data are ______.

For the following data, there is one outlier: 1, 1, 2, 2, 3, 50

Define the three measures of central tendency described in this chapter. Explain how to determine each for a given dataset.

For this survey dataset, the mode is equal to 4: 4, 5, 1, 4, 1, 2, 2, 3

A common shape in which data are found resembling a bell or hill is called a ______ distribution.

The mode is ______.

The average deviation of a sample is always ______.

A number that summarizes a population is a ______, whereas a number that summarizes a sample is a ______ .

Determine the median for the following data on sales in Euros: 5426, 2681, 4200, 3766, 4437

A dataset where the tail leads to the right would have a positive skew.

The least robust but most precise measure of central tendency is the ______.

If you want to find the middle of a dataset, you are calculating variability.

For the following problems, consider this frequency table of survey data: F rel. f cum. f 2 0.15 0.15 3 0.23 0.38 3 0.31 0.69 4 0.23 0.92 1 0.08 1.00 -What is the mean of the sample described by this frequency table?

Determine the mode for the following survey data: 2, 5, 2, 2, 5, 1, 4

You have measured annual salary in Euros for your current employees. Which measures of central tendency would be appropriate for this variable?