Measures of Center
Terms
Random
Measures of Relative Standing
Measures of Variation
100
What is this equation used to calculate? Be specific
Sample mean
100
What is the measure of variation that is equal to the square of the standard deviation?
Variance
100
What is the only measure of center that doesn't need to be rounded to carry one more decimal place than the original data values?
Mode
100
What is another name for a boxplot?
box-and-whisker diagram
100
Find the range of the following values:
1, 2, 5, 3, 6, 4, 1, 3, 6, 3, 2, 5, 3, 7
Make sure to round your answer correctly
6.0
200
Find the median of the following values:
1, 2, 2, 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 9
Make sure your answer is rounded correctly
4.5
200
What values are needed to find the 5-number summary?
1) Minimum
2) Q1
3) Q2 (median)
4) Q3
5) Maximum
200
Percentiles and quartiles are measures of what?
Location / Relative Standing
200
Two z-scores were found.
The first came out to be -0.87
The second came out to be 2.41
Label the two scores as usual or unusual
-0.87 is usual
2.41 is unusual
200
If the standard deviation of a set of values is 25, what is the variance?
Make sure to round your answer correctly
625.0
300
Find the mode(s) of the following data values:
1, 7, 2, 6, 8, 7, 2, 6, 1, 9, 6, 2, 5, 2, 7, 1, 3
Make sure your answer is rounded correctly
2
300
What is it called when a set of data values has two data values that occur with the same greatest frequency? In other words...it has two modes.
Bimodal
300
How many Quartiles are there?
How many Percentiles are there?
Quartiles = 3
Percentiles = 100
300
The most recent earthquake had a magnitude of 2.95. That earthquake and 49 others were tracked and recorded. The mean of the 50 earthquakes was 1.184 with a standard deviation of 0.587.
What is the z-score for the most recent earthquake?
3.01
300
Use the Range Rule of Thumb to estimate the value of the Standard Deviation of the following values:
17, 20, 29
Make sure to round your answer correctly
12/4
=3.0
400
Find the mean of the following values:
1, 1, 3, 4, 5, 6, 7, 8, 9
Make sure your answer is rounded correctly
4.9
400
What is the term used to denote the number of standard deviations that a given value is above or below the mean?
z-score / standardized value
400
What kind of statistics summarizes or describes relevant characteristics of data? (Hint: 3.1)
descriptive statistics
400
The following values are the duration in seconds for 8 eruptions of the Old Faithful geyser:
178, 245, 245, 250, 250, 251, 254, 260
Find the correct percentile for the value of 251.
P63 or the 63rd percentile
400
What percent of values lie within 2 standard deviations of the mean according to the Empirical Rule and Chebyshev's Theorem respectively?
E: 95%
C: 75%
500
Find the midrange of the following values:
1.212, 5.2, 7.4, 3.7, 2.2, 8.3, 3.5, 6.1, 5.9
Make sure your answer is rounded correctly
4.76
500
What is the measure of how much sample data values deviate away from the mean?
Standard deviation , s
500
FINAL JEOPARDY
Boxing up your P's and Q's
500
The following values are the duration in seconds for 8 eruptions of the Old Faithful geyser:
178, 245, 250, 250, 250, 251, 254, 260
Find Q1.
247.5 seconds
500
Find the standard deviation of the following values:
17, 20, 29
Make sure to round your answer correctly
1) Mean: 22.0
2) -5, -2, 7
3) 25, 4, 49
4) 78
5) 78/2
6) sqrt(39) = 6.24499799
s = 6.2