Measures of Central Tendency (& Range)
Standard Deviation
Box Plots
Paired Data
Miscellaneous
100
Find the mode of: 6, 4, 5, 7, 3, 7, 5, 4, 4, 5, 6, 5
5
100
Find the Standard Deviation of: 34, 15, 23, 25, 43, 28, 23 Round to the nearest tenth.
9.0
100

Which of the following appears on a box and whisker plot?

a. mean

b. median

c. mode

b. median

100

If the values of one variable increase as the values in another variable decrease, what type of correlation exists?

negative correlation

100
What does IQR stand for? And how to do you find it?
"interquartile range"; Q3 - Q1
200
Find the range of: 45, 65, 12, 87, 65, 98, 62, 55, 27
98 - 12 = 86
200

A random sample of receipts from individuals eating at a particular restaurant showed the sample mean to be $10.38.   The sample standard deviation was $2.17.   Find the coefficient of variation.   Express your answer as a percent rounded to the nearest tenth.  

20.9%

200

What is the five-number summary for a box plot?

min, Q1, median, Q3, max

200

What type of correlation exists when an increase of one unit in one variable is always accompanied by the same proportional increase in the other variable.

perfect positive correlation (r = 1.0)

200

Bob is in a class of 30 students.    If his score on a tests was in the 80th percentile, how many students scored better than him on the tests?

6

300
What is the mean (average) of: 5, 8, 9, 6, 4, 5, 2, 1
total = 40 / 8 = 5
300

Find the standard deviation of the sample data: 9, 6, 7, 3, 5, 7, 6, 8, 3 Round to the nearest whole number.

2

300
Find the five-number summary for the set of data below: 18, 21, 22, 29, 19, 26, 17, 22
min: 17, max: 29, median: 21.5, Q1: 18.5, Q3: 24
300

Find the equation of the line of best fit for the ordered pairs listed below 

(3, 5), (5, 7), (10, 12), (15, 19)

y = 1.16x + 1.22

300
Which measure of central tendency is greatly affected by outliers?

the mean

400

What is the median of: 5, 8, 9, 6, 6, 2, 4, 1

1, 2, 4, (5, 6), 6, 8, 9 so median = 5.5

400

Find the standard deviation of the POPULATION data: 4, 3, 7, 11, 4, 6, 6, 8 Round to the nearest tenth.  

2.4

400
What percent of data is contained between Q1 and Q3?
50%
400

Find the equation of the line of best fit for the ordered pairs listed below 

(12, 5), (8, 7), (7, 12), (5, 19)

y = -1.88x + 25.8

400

Although two variables may be strongly correlated, it is important that we never assume that ___________________________________ . 

Change in one variable is CAUSING the change in the other variable.  

500

Find the mean, median, and mode of: 6, 7, 14, 4, 7, 8, 7, 3

mean = 7 median = 7 mode = 7 range = 14 - 3 = 11

500

A random sample of 5 fish caught from a particular lake had the following lengths (in inches):   21, 27, 46, 35, 42.  What is the standard deviation of this sample? (Round your answer to the nearest tenth)

10.3

500
Looking at a box plot, how can you tell if there may be an outlier in the data?
one of the whiskers is significantly longer than the other portions of the box plot.
500

Calculate the correlation coefficient (r ) for the data set below.  Round to the nearest tenth.    In addition, characterize the strength and direction of the correlation.  

(12, 5), (8, 7), (7, 12), (5, 19)

r = -0.9.  Strong, negative

500

How does a left skewed distribution affect the mean of the data set?

It pulls the mean to the left (or lowers the mean)

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