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Descriptive Statistics in Educational Research MCQ

A raw score that has been transformed into _____ units is called z score .

Standard deviation

Variance

Range

All of above

Answer

Correct Answer: Standard deviation

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The point where the regression line crosses the _____ is called y-intercept

X-axis

Y-axis

Z-axis

All axis

Answer

Correct Answer: Y-axis

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A measure of the average deviation from the mean in squared units is called

Range

Variance

Standard deviation

All of above

Answer

Correct Answer: Variance

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Scores that have been converted from one scale to another to have a particular mean and standard deviation is called

Standard scores

Simple scores

Mean scores

All of above

Answer

Correct Answer: Standard scores

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The square root of the variance is known as

Range

Variance

Standard deviation

All of above

Answer

Correct Answer: Standard deviation

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Not symmetrical is called skew

True

False

Answer

Correct Answer: True

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Regression based on one dependent variable and one independent variable is called simple regression

True

False

Answer

Correct Answer: True

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A graph used to depict the relationship between two _____ is called scatter plot

Quantitative variables

Qualitative variables

Constant variables

None of above

Answer

Correct Answer: Quantitative variables

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The line that best fits a pattern of observations is called

Regression analysis

Regression coefficient

Regression equation

Regression line

Answer

Correct Answer: Regression line

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The equation that defines the regression line is called

Regression analysis

Regression coefficient

Regression equation

Regression line

Answer

Correct Answer: Regression equation

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The predicted change in Y given a 1-unit change in X is called

Regression analysis

Regression coefficient

Regression equation

Regression line

Answer

Correct Answer: Regression coefficient

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A set of statistical procedures that are used to explain or predict the values of a dependent variable on the basis of the values of one or more _____ is called regression analysis

Dependent variables

Independent variables

Constant variables

None of above

Answer

Correct Answer: Independent variables

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The norm group that is used to determine the percentile ranks is called reference group

True

False

Answer

Correct Answer: True

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The percentage of people in a group who have a specific characteristic is called

Rate

Speed

Velocity

Acceleration

Answer

Correct Answer: Rate

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The difference between the highest and lowest numbers is called

Range

Variance

Standard deviation

None of above

Answer

Correct Answer: Range

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Skewed to the _____ is called positively skewed

Right

Left

Midway

None of above

Answer

Correct Answer: Right

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Scores that divide a distribution into _____ equal parts is percentile ranks

100

150

Answer

Correct Answer: 100

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The percentage of scores in a reference group that fall below a particular raw score is called percentile ranks

True

False

Answer

Correct Answer: True

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A regression coefficient obtained in multiple regression is partial regression coefficients

True

False

Answer

Correct Answer: True

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A number that is very atypical of the other numbers in a distribution is called

Outlier

Range

Rate

Percentage

Answer

Correct Answer: Outlier

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A unimodal, symmetrical, bell-shaped distribution that is the theoretical model of many variables is normal distribution

True

False

Answer

Correct Answer: True

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Skewed to the left is negatively skewed

True

False

Answer

Correct Answer: True

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Which exclusive refers to response categories that do not overlap?

Single

Mutual

Multiple

Normal

Answer

Correct Answer: Mutual

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In which regression based on one dependent variable and two or more independent variables?

Single

Multiple

Normal

None of these

Answer

Correct Answer: Multiple

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The most frequently occurring number is called

Median

Mean

Mode

All of these

Answer

Correct Answer: Mode

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The 50th percentile is called

Median

Mean

Mode

All of these

Answer

Correct Answer: Median

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Provide information about where a score falls in relation to the other scores in the distribution of data is measure of relative standing

True

False

Answer

Correct Answer: True

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A numerical index that provides information about how spread out the data values are or how much variation is present is measure of variability

True

False

Answer

Correct Answer: True

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The single numerical value considered most typical of the values of a quantitative variable is measure of central tendency

True

False

Answer

Correct Answer: True

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The arithmetic average is known as

Median

Mean

Mode

All of these

Answer

Correct Answer: Mean

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A graph that relies on the drawing of one or more lines is called

Line graph

Bar graph

Pie graph

All of these

Answer

Correct Answer: Line graph

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Statistics that go beyond the immediate data and infer the characteristics of populations based on samples is _____ statistics

Descriptive statistics

Inferential statistics

Statistics

All of these

Answer

Correct Answer: Inferential statistics

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A set of numbers with little variability is _____

Homogenous

Heterogenous

Progenous

All of these

Answer

Correct Answer: Homogenous

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A graphic that shows the frequencies and shape that characterize a quantitative variable is called

Instagram

Histogram

All of these

Answer

Correct Answer: Histogram

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A set of numbers with a great deal of variability is called

Homogeneous

Heterogeneous

Variation

None of above

Answer

Correct Answer: Heterogeneous

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The data values are clustered or grouped into separate intervals, and the frequencies of each interval are given is grouped frequency distribution

True

False

Answer

Correct Answer: True

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An arrangement in which the frequencies of each unique data value are shown is frequency distribution

True

False

Answer

Correct Answer: True

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Exhaustive refers to the property that the set of intervals covers the complete range of data values is called

Exhaustive

Descriptive

Inferential

All of these

Answer

Correct Answer: Exhaustive

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Statistics that focus on describing, summarizing, and explaining a particular set of data is called

Descriptive statistics

Inferential statistics

Statistics

All of these

Answer

Correct Answer: Descriptive statistics

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A set of data is known as

Data

Data set

Data value

None of these

Answer

Correct Answer: Data set

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In which table displaying information in cells formed by the intersection of two or more categorical variables?

Contingency

Periodic

Math

All of these

Answer

Correct Answer: Contingency

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A graph that uses vertical bars to represent the data is called

Line graph

Bar graph

Pie graph

All of these

Answer

Correct Answer: Bar graph

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A percentile rank reflects the percentage of scores in a reference group that fell below a certain raw score.

True

False

Answer

Correct Answer: True

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Raw scores that have been transformed into standard deviation units are called z scores.

True

False

Answer

Correct Answer: True

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A scatterplot is used to show the frequencies and shape that characterize a single quantitative variable.

True

False

Answer

Correct Answer: False

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The square root of the variance is the standard deviation.

True

False

Answer

Correct Answer: True

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Approximately 99% of scores fall within 2 standard deviations of the mean in a normal distribution.

True

False

Answer

Correct Answer: False

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Which of the following rules is correct when reading a contingency table?

If the percentages are calculated down the columns, compare down the columns.

If the percentages are calculated down the columns, compare across the rows.

If the percentages are calculated down the columns, compare column totals.

The numbers must be analyzed by a correlation to be interpretable.

Answer

Correct Answer: If the percentages are calculated down the columns, compare across the rows.

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If a test was very easy for the vast majority of students, except for a few students who had very low scores, then the distribution of scores would be ______.

Positively skewed

Negatively skewed

Not skewed at all

Normal

Answer

Correct Answer: Negatively skewed

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In a fully normal distribution of scores, which of the following is true?

The mean, median, and mode are the same number.

The mean is larger than the median.

The median is larger than the mean.

It depends on the scaling of the numbers.

Answer

Correct Answer: The mean, median, and mode are the same number.

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What procedure is used to explain or predict the values of a dependent variable based on the values of two or more independent variables?

Simple regression analysis

Multiple regression analysis

Path analysis

Predictive regression analysis

Answer

Correct Answer: Multiple regression analysis

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Which of the following is a measure of variability?

Median

Variance

Intercept

Mode

Answer

Correct Answer: Variance

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Which of the following is a measure of central tendency?

Mean

Range

Standard deviation

Correlation coefficient

Answer

Correct Answer: Correlation coefficient

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How is a set of data organized?

Each participant gets a column, and each variable gets a row.

Each participant gets a row, and each variable gets a column.

Each variable is in a row and each participant’s score is in a different column.

Participants get the same number of rows as there are variables.

Answer

Correct Answer: Each participant gets a row, and each variable gets a column.

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Hypothesis testing and estimation are both types of ______ statistics.

Descriptive

Predictive

Inferential

Exploratory

Answer

Correct Answer: Inferential

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We want to predict a person’s achievement test score using his or her years of education and aptitude test score. Here is the appropriate regression equation:Y = 25 + .5X1 +10X2,where Y = achievement test score, X1 = years of education, and X2 = aptitude test score.If the person has 10 years of education and an aptitude test score of 5, then what is his predicted achievement score? (Hint: just insert 10 for X1 and 5 for X2 in the equation.)

Answer

Correct Answer: 80

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What is the median of the following set of scores: 22, 6, 10, 11, 14?

Answer

Correct Answer: 11

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