Variability
Standard Deviation
Asst.
Descriptive Stats
Descriptive Stats
100
.Why are statistics important?
Statistics helps you find the meaning in data, and whether there is a pattern or no pattern
100
What does standard deviation represent
It indicates how well the mean describes the entire data set
100
____% are no more than 1SD from the mean
68%
100
What do descriptive statistics do?
They summarize data
100
What scale would you use for house number and school address?
ordinal
200
How can we measure variability?
range, average deviation, and standard deviation
200
What does a smaller value indicate in standard deviation
that the mean is highly representative of the data
200
____% are no more than 2SD from the mean
95%
200
nominal, ordinal, interval, ratio
What are the 4 scales of measurement
200
what does M represent
population mean
300
The distance between the 2 most extreme scores, min and max.
What is Range
300
What does a larger value indicate in standard deviation
that the mean is not representative of the data
300
draw a negatively skewed distribution
one really negative score changes the shape of the entire distribution
300
Which scale of measurement would you use for a kind of a pet
nominal
300
when is the median useful
there is an outlier
400
E (x-M)/ N
What is the formula for average deviation
400
What is standard deviation
4.56
400
What is a positively skewed distrubution
one really positive score changes the shape of the entire distribution
400
Which scale of measurement would you use for a scale on an IQ test?
interval
400
What is the equation to find the mean
E X/N
500
the square root of E (x-M) /N
What is the formula to average deviation
500
Why is 4.56 "standard" deviation
the majority of the data points fall within 4.56 units from the mean
500
What is the mean of 1, 2, 6
3
500
Which scale of measurement would you use for measuring time?
ratio
500
Which scale of measurement would you not use the median for?
nominal
M
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