This is a collection of methods for classifying and summarizing numerical data
For example: hours of television per day watched by a group of psychology majors
What is Descriptive statistics?
100
This is a bar graph that depicts the frequencies of individual scores or scores in intervals by the length of its bars.
The bars are not separated, intervals are arranged from lower numbers on the left to higher numbers on the right
The values of the variable are on the x-axis and frequencies are on the y-axis
What is a histogram?
100
A histogram is similar to a bar graph except that the:
bars touch in the histogram and not in the bar graph.
100
The three measures of central tendency.
What is mean, median, and mode?
100
This is how you obtain the range.
What is Subtracting the lowest score from the highest score?
200
This is a set of observations drawn from the population of interest.
What is a Sample?
200
This graph places a dot above each score or interval to indicate the frequency.
The dots are connected.
What is a Frequency polygon?
200
A(n) ________ is often seen in negatively skewed distributions, while a(n) ________ is often seen in positively skewed distributions.
What is the ceiling effect and the floor effect?
200
This is how you calculate the mean.
What is the sum of the data divided by the number of data points?
200
This is the average of squared deviations from the mean.
What is Variance?
300
One takes on only specific values. The other takes on a full range of values.
What is the difference between discrete observations and continuous observations?
Example: Discrete could be the number of students in a class. Continuous could be salary.
300
The steps to construct a frequency polygon.
What is determining the midpoint, drawing and labeling the axis, placing dots above each value, and connecting the dots.
300
The numbers of avalanche fatalities in Colorado for the last nine seasons were reported as 1, 1, 5, 5, 5, 5, 8, 10. Roughly this type of distribution is shown.
What is "normal"?
300
This is the point below which 50% of scores fall.
What is the median?
300
The four steps to calculate the Variance.
What is subtract, square, sum, and divide?
400
These four levels of measurement are used for:
1. observations that have categories or names as their assigned value.
2. observations that have rankings as their value
3. for observations that have numbers as their values and have intervals that are equal.
4. Variables that meet the criteria for interval variables but also have a meaningful zero points.
What is nominal, ordinal, interval, and ratio?
400
The steps to construct a histogram.
What is determining the midpoint, drawing and labeling the axis, and then drawing a bar at each midpoint as high as the frequency for that interval.
400
This refers to the steepness of a distribution in its center.
What is Kurtosis?
"Fatty Platy; Leaping Lepto; and Middle Meso"
Platykurtic, Leptokurtic, and Mesokurtic.
400
This is the most frequent score in distribution. Commonly used in nominal data or data that is bimodal or multimodal.
What is the mode?
400
This is the Average amount scores vary from the mean. It also is the Square root of the variance.
What is Standard Deviation?
500
The difference between a Correlational Method and an Experiment?
What is an association between two variables versus having an experimental group and control group where the differences are looked at?
500
This allows us to depict data visually by reporting the frequencies within a given interval rather than the frequencies for a specific value.
What is a grouped frequency table?
500
If a distribution is skewed with its tail going towards the right, what kind of distribution is this?
What is a positive skew?
500
This is the best if distributions are skewed by outliers or when you have only a handful of observations.
What is the median?
500
These are the measures of variability.
What is the range, variance, and standard deviation?