Statistics Quiz # 17

All the possible subjects or cases of interest is called

Sample

Data

Population

Individual

The most representative score in a set of scores is called

Average

Accuracy

Mode

All of these

The mean, the median, and the mode is included in measure of central tendency

True

False

A type of average calculated by summing values and dividing that sum by the number of values is known as

Mean

Median

Mode

All of these

A measure of central tendency calculated by summing all the scores and ____ by the number of scores.

Adding

Dividing

Subtracting

Multiplying

The percentage of cases equal to and below a particular score in a distribution or set of scores is called percentile ranks.

True

False

The quality of a distribution that defines the disproportionate frequency of certain scores is called

Mean

Skew

Median

Mode

Whether a score is an outlier or not is usually an arbitrary decision made by the researcher.

True

False

____ is most frequently occurring score in a distribution

Median

Mean

Mode

All of these

Data point is an ____

Experiment

Observation

Theory

Law

Different ways of categorizing measurement outcomes: nominal, ordinal, interval, and ratio is called scale of measurements.

True

False

____ is the gross level of measurement by which a variable’s value can be placed in one and only one category.

Nominal level of measurement

Ordinal level of measurement

Interval level of measurement

Ratio level of measurement

A ordinal level of measurement that places a variable’s value into a category and assigns that category an order with respect to other categories.

True

False

An interval level of measurement that places a variable’s values into categories that are equidistant from each other, as when points are evenly spaced along a scale.

True

False

A level of measurement defined as having an ____ zero.

Full

Absolute

Percent

None of these

How much scores differ from one another or, put another way, the amount of spread or dispersion in a set of scores is called

Range

Standard deviation

Variability

Reliability

____ is a gross mea­sure of variability.

Range

Mean

Median

Mode

The average amount of variability in a set of scores or the scores’ average deviation from the mean is called

Mean deviation

Standard deviation

Positive deviation

Negative deviation

The average deviation for all scores from the mean of a distribution, calculated as the sum of the absolute value of the scores’ deviations from the mean divided by the number of scores is called

Mean deviation

Standard deviation

Positive deviation

Negative deviation

Unbiased estimate is a conservative estimate of a population parameter.

True

False

The square of the standard deviation and another measure of a distribution’s spread or dispersion is called variance

True

False

Which method is for illustrating how often scores occur in groups?

Histogram

Frequency distribution

Sample distribution

Cumulative frequency distribution

A ____ range of values, used in the creation of a frequency distribution is class interval

Fixed

Constant

Variation

Different

A graphical representation of a frequency distribution that uses bars of different heights to show the number of values that fall within each class interval is called

Histogram

Telegram

Polygon

None

The central point in a class interval.

____ is the central point in a class interval.

Mean

Mode

Mid point

Scale point

In which frequency graphical representation of a frequency distribution that uses a continuous line to show the number of values that fall within a class interval?

Triangle

Variation

Polygon

All of these

A ____ frequency distribution that shows frequencies for class intervals along with the cumulative frequency at each.

Histogram

Frequency distribution

Sample distribution

Cumulative frequency distribution

In which frequency ogive is representation of a ___ distribution

Histogram

Frequency distribution

Sample distribution

Cumulative frequency distribution

In which index correlation coefficient that reflects the relationship between two variables?

Physical

Numerical

Chemical

All of these

Correlation coefficient that reflects the relationship between two variables, specifically how the value of one variable changes when the value of the other variable changes.

True

False