Behavioral Stats Test 1
Which measure of central tendency is most appropriate for skewed distributions?
Median
Which of these measures is LEAST affected by outliers?
Median
In a negatively skewed distribution, which measure will generally have the highest value?
Mode
Which measure of central tendency is LEAST efficient?
Mode
Which measure of central tendency works for nominal variables?
Mode
A normal distribution has a value of skewness that is
Near zero
Which of these measures of central tendency works for nominal variables?
Neither the mean nor the median works for nominal variables.
A normal distribution generally has _____ skew.
No
For a study to be considered an experiment, it must have
A manipulation
If a web marketer compares the effectiveness of two online ads in getting click by gathering data from 3 million Internet shoppers, the population of interest is
All internet shoppers
Compared to a mesokurtic distribution, the tails of a leptokurtic distribution
Are longer
Which type of chart would be most appropriate for a nominal variable?
Bar graph
A distribution with two distinct peaks can be described as.
Bimodal
When a histogram or polygon chart for a quantitative variable has two distinct peaks, then the distribution is referred to as _____.
Bimodal
For which levels of measurement can you calculate the mode?
Both ordinal and interval
One good use of the range is to.
Check for outliers
The variable that is measured as the outcome in an experiment is called the _____ variable.
Dependent
A score's frequency is determined by.
How often it occurs in a data set
Which measure of variation is LEAST sensitive to outliers?
IQR
In an experiment, the variable that the researcher manipulates is called the _____ variable.
Independent
If the number of games a team has lost in a season is subtracted from the number of games that they won in that season, the resulting variable would be at the _____ level of measurement.
Interval
Temperature in celsius or Fahrenheit (but not Kelvin) is measured at which level of measurement?
Interval
What is the minimum level of measurement needed to calculate the mean?
Interval
Which of the following is a defining characteristic of experiments?
Manipulations
In a positively skewed distribution, which measure will generally have the highest value?
Mean
Which measure of central tendency is MOST affected by outliers?
Mean
Which measure of central tendency is MOST influenced by outliers?
Mean
The three most common measures of central tendency are:
Mean, median, mode
A question that asks a person which religion (if any) they identify with is at the _____ level of measurement.
Nominal
A variable that classifies people into racial or ethnic groups is what level of measurement?
Nominal
If a person's sex is coded as Male = 0 or Female = 1, then that variable is at the _____ level of measurement.
Nominal
If a person's sex is coded as Male = 1 or Female = 2, then that variable is at the _____ level of measurement
Nominal
If a person's sex is recorded as "Male" or "Female," then that variable is at the _____ level of measurement.
Nominal
The only level of measurement that does not place scores or categories into order (and is therefore the lowest level of measurement) is the _____ level of measurement.
Nominal
The respondent's gender is typically recorded as a(n) _____ variable.
Nominal
What is the minimum level of measurement needed to calculate the mode?
Nominal
A frequency bar graph would be most appropriate for which measurement scales?
Nominal or ordinal
Compared to a mesokurtic distribution, the peak of platykurtic distribution is
Not as high
A question that asks whether a person believes they are more creative, less creative, or just as creative as other people is at the _____ level of measurement.
Ordinal
What is the minimum level of measurement needed to calculate the median?
Ordinal
A sample is a part of a larger
Population
Which is bigger: a sample or a population?
Population
A distribution such as income that has most of the people at the bottom or middle but a few people with extremely high scores, is referred to as.
Positively skewed
When data are negatively skewed, which measure of variability is most appropriate?
Quartiles (such as the interquartile range)
When open-ended scores are present in the data, which measure of variability is most appropriate?
Quartiles (such as the interquartile range)
Which measure of variation is most influenced by outliers?
Range
A question that asks how many times a person attends religious services each year is at the _____ level of measurement.
Ratio
A variable that records how many seconds it take for a person to spell a word backwards is at the _____ level of measurement.
Ratio
The amount of time that a person spends on social media each week in minutes is a(n) _____ variable.
Ratio
The highest level of measurement (i.e., the one that contains the most information) is the _____ level of measurement.
Ratio
The number of students enrolled in a school each year is an example of which level of measurement?
Ratio
What is the highest level of measurement?
Ratio
Which level of measurement has a true zero point?
Ratio
If a researcher is able to survey 99% of all students enrolled in statistics classes at a college, then that researcher has gathered data from a(n)...
Sample
Which measure requires a degrees of freedom calculation?
Sample variance
A population can never be
Smaller than one of its samples.
For a normal distribution, which measure of variability is most efficient (in the statistical sense)?
Standard deviation
Which of the following is NOT a measure of central tendency?
Standard deviation
In an experiment that looks at the effect of different teaching methods on student learning, the independent variable is
Teaching method
Which measure of central tendency is always influenced by outliers?
The mean
Which of these measures is MOST affected by outliers?
The mean
Which of the following measures of central tendency can be used with data on the ratio level of measurement?
The mean or the mode
What does the label "Q2" refer to?
The median score or the 50th percentile
If the formula for the population standard deviation were used with sample data, then result would be.
Too small
When a histogram for a quantitative variable has only one distinct peak, then the distribution is referred to as..
Unimodal
If scores in a data set are very different from each other, then the standard deviation.
Will be high
Inferential statistics are typically contrasted with _____ statistics.
descriptive
A question that asks a person how strong their motivations for religious participation are using a 1-7 rating scale is at _____ level of measurement.
either the ordinal or the interval
A uniform distribution.
is platykurtic
A narrow distribution that is sharply pointed in the middle and that has many outliers is called.
leptokurtic
The normal distribution is
mesokurtic
A univariate analysis typically focuses on.
one variable at a time.
A histogram is appropriate when the data are.
quantitative
One visual difference between a bar chart and a histogram is that in a histogram.
the adjacent bars touch but in a bar chart they are separate
A bivariate analysis typically focuses on
the association of two variables
