TRUE OR FALSE: The median is the best measure of central tendency to represent skewed distributions because the mean is sensitive to outliers.

TRUE OR FALSE:In a symmetrical distribution, the mean, median, and mode share the same value.

TRUE OR FALSE: It is possible to calculate all three measures of dispersion for an ordinal-level variable.

TRUE OR FALSE: In statistics, the word "variation" is a general term used to describe differences in statistical values whereas the "variance" is a specific statistical value that indicates the average of all squared deviations for a given variable.

We use the formula below to find the...

2=(Xi)2N

Group of answer choices

population standard deviation

sample standard deviation

population variance

sample variance

If all observations in a distribution share the same value, the standard deviation is equal to...

Group of answer choices

0

-1

1

What is the mean of the distribution of test scores (measured in points) below?

Student's Test Scores (n=5): 98, 79, 86, 95, 80

Group of answer choices

84.0

87.6

88.9

90.2

What is the standard deviation for the following sample of quiz scores?

Quiz Scores (n=3): 100, 90, 80

Group of answer choices

200

100

66.67

10

If a givensamplehas a mean of 75 and a variance of 100, then then thestandard deviationequals...

Group of answer choices

100

25

10,000

10

If a given population has a mean of 5 and a standard deviation of 3, then then the variance equals...

Group of answer choices

9

6

5

1.5

What value should we use to compare the dispersion of two distributions with different means?

Group of answer choices

Standard Deviation

Sum of Squares

Variance

Coefficient of Relative Variation (CRV)

I completed a survey of a sample of undergraduate Ohio State students, and asked them the number of hours they spend in class each week. The data indicate that the median is 10 hours, which tells us that...

Group of answer choices

most of the students sampled spend 10 hours in class per week.

half of all students sampled spent 10 or more hours in class per week, and half of all students sampled spent 10 or fewer hours in class per week.

more students spend 10 hours in class per week than any other number of hours.

the students sampled spend an average of 10 hours in class per week.

Using the information in the table below, identify the median.

# of Hours Studying	Frequency (f)	Relative Percentage	Cumulative Percentage
0 to 3 hours	24	9.6 %	9.6%
4 to 7 hours	49	19.6%	29.2%
8 to 11 hours	103	41.2%	70.4%
12 to 15 hours	67	26.8%	97.2%
16 or more hours	7	2.8%	100.0%
TOTAL	500	100.0%

Group of answer choices

4 to 7 hours

8 to 11 hours

41.2%

29.2%

In a negatively-skewed distribution (i.e., left-skewed distribution), the mean value is ________ the median value.

Group of answer choices

more than

less than

A z-score is...

Group of answer choices

calculated by dividing the standard deviation by the mean.

a theoretical distribution.

a standardized score that reveals how well the sample data approximates the population phenomena.

a standardized score that reveals the relative location of an observation within its distribution.

We use the formula below to find the...

s=(xix)n1

Group of answer choices

population standard deviation

population variance

sample standard deviation

sample variance

Which measure of central tendency is best to use with the variable below and why?

Variable: Favorite Food

x_i (variable's values): Pizza, Tacos, Pasta, Burgers

Group of answer choices

The mean because it takes into account all observations on the variable.

The median because the distribution is skewed.

The mode because it is a nominal-level variable.

We cannot find any measures of central tendency for this variable.

Using the information in the table below, identify the mode of the distribution.

Level of Religiosity (n=85)

Level of Religiosity	Frequency (f)	Relative Percentage	Cumulative Percentage
Extremely Religious	5	5.9%	5.9%
Very Religious	10	11.8%	17.7%
Somewhat Religious	35	41.1%	58.8%
Not Very Religious	25	29.4%	88.2%
Not Religious	10	11.8%	100.0%
TOTAL:	85	100%

Group of answer choices

88.2%

41.1%

Not Very Religious

Somewhat Religious

The ________ of a given z-score indicates whether the value is above or below the mean.

Group of answer choices

sign (+ or -)

value