Exam 4: Summarizing Data: Measures of Variation

The measure of variation that is most affected by outliers is the:

The number of sales of homes having two bedrooms or less in a state for a ten-week period in 1987 is given in the following table: -For a two-bedroom or less home in this state during the given period, find the variance of the prices.

The mean, median, and standard deviation of a list of numbers are 128, 160, and 8.2. Suppose that the number 25 is added to each number in the list. -What is the new value of the median?

The number of sales of homes having two bedrooms or less in a state for a ten-week period in 1987 is given in the following table: -For a two-bedroom or less home in this state during the given period, find the standard deviation of the price.

The following is a list of the number of dollars a sample of students say they are willing to spend for a present for a close friend. Males: $25,80,30,50,45,30,260,60,50$ Females: $15,35,60,55,40,90,100,25,30$ -Find the interquartile range for the males.

The following is a list of the number of dollars a sample of students say they are willing to spend for a present for a close friend. Males: $25,80,30,50,45,30,260,60,50$ Females: $15,35,60,55,40,90,100,25,30$ -Find the range for the entire group.

Which of the following does not provide an application of the standard deviation?

Table 2 Two companies have the following sales results for a particular month. -Use the data in Table 2 to solve the following: In company 1 , between what values does at least $35 / 36$ of the salespersons' sales fall?

An outlier is an extreme value in the data that may be due to an error in measurement.

Table 2 Two companies have the following sales results for a particular month. -Use the data in Table 2 to solve the following: A salesperson with $\$ 6000$ of sales has lower sales relative to the mean in which of the two companies?

How does the interquartile range compare to the range when the distribution is shaped like a U?

Distributions having a tail to the right are called negative skewed.

If a distribution has the general shape of the cross section of a bell, then the _______ allows for a stronger statement than Chebyshev's theorem.

At the start of the program, ten dieters entering a weight-loss program have the weights (in pounds) shown below. $182,160,120,140,155,136,115,190,144,200$ -For this data, find the hinges.

Table 2 Two companies have the following sales results for a particular month. -Use the data in Table 2 to solve the following: In company 1 , at least what percentage of salespersons have sales between $\$ 7000$ and $\$ 9000$ ?

A set of data has a mean of 80 and a standard deviation of 5 . To determine two values that contain at least $\frac{8}{9}$ of the data, we use:

At the start of the program, ten dieters entering a weight-loss program have the weights (in pounds) shown below. $182,160,120,140,155,136,115,190,144,200$ -For this data, using the hinges as quartiles, find the interquartile range.

The number of standard deviations a value lies above or below the mean is given by a _______.

Which of the following symbols represents a sample value, not a population value?

When drawing a boxplot, we usually omit _______ from the data.