Exam 3: Numerical Descriptive Measures

The median of the values 3.4, 4.7, 1.9, 7.6, and 6.5 is 4.05.

The median of the values 3.4, 4.7, 1.9, 7.6, and 6.5 is 1.9.

You were told that the 1st, 2nd, and 3rd quartiles of students' weight at a major university are 95 lbs, 125 lbs, and 138 lbs. What percentage of the students weigh less than 95 lbs?

If the distribution of a data set were perfectly symmetrical, the distance from Q₁ to the median would always equal the distance from Q₃ to the median in a boxplot.

TABLE 3-8 The time period from 2006 to 2009 saw a great deal of volatility in the value of stocks. The data in the following table represent the total rate of return of our companies from 2006 to 2009. -Referring to Table 3-8, calculate the geometric mean rate of return for Company B.

TABLE 3-1 Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid and have no private health insurance. The ages of 25 uninsured senior citizens were as follows: -Referring to Table 3-1, identify which of the following is the correct statement.

TABLE 3-1 Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid and have no private health insurance. The ages of 25 uninsured senior citizens were as follows: -Referring to Table 3-1, identify the first quartile of the ages of the uninsured senior citizens.

A manufacturer of flashlight batteries took a sample of 130 batteries from a day's production and used them continuously until they were drained. The number of hours until failure are recorded. Given below is the boxplot of the number of hours it took to drain each of the 130 batteries. The distribution of the number of hours is

The 5-number summary consists of the smallest observation, the first quartile, the median, the third quartile, and the largest observation.

In general, which of the following descriptive summary measures cannot be easily approximated from a box-and-whisker plot?

The line drawn within the box of the boxplot always represents the arithmetic mean.

In a set of numerical data, the value for Q₃ can never be smaller than the value for Q₁.

TABLE 3-2 The data below represent the amount of grams of carbohydrates in a serving of breakfast cereal in a sample of 11 different servings. -Referring to Table 3-2, the first quartile of the carbohydrate amounts is ________ grams.

The line drawn within the box of the boxplot always represents the median.

In a perfectly symmetrical bell-shaped "normal" distribution

TABLE 3-1 Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid and have no private health insurance. The ages of 25 uninsured senior citizens were as follows: -Referring to Table 3-1, identify the interquartile range of the ages of the uninsured senior citizens.

Which of the arithmetic mean, median, mode, and geometric mean are resistant measures of central tendency?

When extreme values are present in a set of data, which of the following descriptive summary measures are most appropriate?

The coefficient of variation is a measure of relative variation.