Exam 3: Numerical Descriptive Measures

SCENARIO 3-3 The ordered array below represents the number of vitamin supplements sold by a health food store in a sample of 16 days. Note: For this sample, the sum of the values is 448, and the sum of the squared differences between each value and the mean is 812. -Referring to Scenario 3-3, is the number of vitamin supplements sold in this sample right- or left- skewed?

SCENARIO 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 Scenario 3-2, the arithmetic mean carbohydrates in this sample is ________ grams.

SCENARIO 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 Scenario 3-2, is the carbohydrate amount in the cereal right- or left-skewed?

According to the Chebyshev rule, at least 93.75% of all observations in any data set are contained Within a distance of how many standard deviations around the mean?

SCENARIO 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 Scenario 3-2, the first quartile of the carbohydrate amounts is ________ grams.

Which measure of central tendency can be used for both numerical and categorical variables?

True or False: The geometric mean is useful in measuring the rate of change of a variable over time.

The smaller the spread of scores around the arithmetic mean,

According to the Chebyshev rule, at least what percentage of the observations in any data set are Contained within a distance of 2 standard deviations around the mean?

In perfectly symmetrical distributions, which of the following is NOT a correct statement?

Which of the following is sensitive to extreme values?

In left-skewed distributions, which of the following is the correct statement?

According to the empirical rule, if the data form a "bell-shaped" normal distribution, _______ Percent of the observations will be contained within 1 standard deviation around the arithmetic Mean.

True or False: The coefficient of variation is a measure of central tendency in the data.

True or False: In exploratory data analysis, a boxplot can be used to illustrate the median, quartiles, and extreme values.

SCENARIO 3-3 The ordered array below represents the number of vitamin supplements sold by a health food store in a sample of 16 days. Note: For this sample, the sum of the values is 448, and the sum of the squared differences between each value and the mean is 812. -Referring to Scenario 3-3, the interquartile range of the number of vitamin supplements sold in this sample is ________.

Which descriptive summary measures are considered to be resistant statistics?

According to the Chebyshev rule, at least what percentage of the observations in any data set are Contained within a distance of 3 standard deviations around the mean?

In general, which of the following descriptive summary measures cannot be easily approximated From a boxplot?

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