Data Analysis Midterm Exam 1 Study
Guide-Graded A
the variable(s) that is manipulated by the experimenter or a variable that is conceptually
though to "cause" an effect - ANSWER-Independent Variable (IV)
the variable(s) that is being measured to understand the impact of the manipulation or
conceptually thought to be the effect of the dependent variable - ANSWER-dependent
variable
the arithmetic average of a variable - ANSWER-mean
the middle score of a variable if the scores are arranged in order - ANSWER-median
the most common score - ANSWER-mode
the square root of the variance - ANSWER-standard deviation
the sum of all the squared distance of each case from the mean - ANSWER-variance
skewness: 1.98 graph: scores bunched at low values with the tail pointing to high values
- ANSWER-postive skewness
skewness: -2.4 graph: scored bunched at high values with the tail pointing to low values
- ANSWER-negative skewness
Kurtosis= -.89 graph: skinny and bunched together in the middle - ANSWER-Postive
kurtosis (leptokurtic)
Kurtosis= 4.68 graph: fat and more shaped like a bell curve - ANSWER-Negative
kurtosis (platykurtic)
variables that denote categories or characteristics that a person belongs to (numbers if
used) graph: bar graph - ANSWER-nominal
variables that have an order and describe the ranking if the individual graph: bar graph -
ANSWER-Ordinal
the number is equidistant but no real zero graph: histogram - ANSWER-interval
the number is equidistant and has a true zero graph: histogram - ANSWER-ratio
Guide-Graded A
the variable(s) that is manipulated by the experimenter or a variable that is conceptually
though to "cause" an effect - ANSWER-Independent Variable (IV)
the variable(s) that is being measured to understand the impact of the manipulation or
conceptually thought to be the effect of the dependent variable - ANSWER-dependent
variable
the arithmetic average of a variable - ANSWER-mean
the middle score of a variable if the scores are arranged in order - ANSWER-median
the most common score - ANSWER-mode
the square root of the variance - ANSWER-standard deviation
the sum of all the squared distance of each case from the mean - ANSWER-variance
skewness: 1.98 graph: scores bunched at low values with the tail pointing to high values
- ANSWER-postive skewness
skewness: -2.4 graph: scored bunched at high values with the tail pointing to low values
- ANSWER-negative skewness
Kurtosis= -.89 graph: skinny and bunched together in the middle - ANSWER-Postive
kurtosis (leptokurtic)
Kurtosis= 4.68 graph: fat and more shaped like a bell curve - ANSWER-Negative
kurtosis (platykurtic)
variables that denote categories or characteristics that a person belongs to (numbers if
used) graph: bar graph - ANSWER-nominal
variables that have an order and describe the ranking if the individual graph: bar graph -
ANSWER-Ordinal
the number is equidistant but no real zero graph: histogram - ANSWER-interval
the number is equidistant and has a true zero graph: histogram - ANSWER-ratio
