Definitions
what are statistics?
numbers represented in data
find the mean of the following set of numbers:
19, 21, 6, 12, 5, 3
11
What value is the lower quartile (Q1)?
60
If the mean is Greater than the median in the data set which way is it skewed?
skewed right
what is a measure of central tendency?
numerical value used to describe the overall clustering of data in a set
find the median of the following set of numbers:
1, 3, 3, 6, 7, 8, 9
6
Which measure of central tendency is most affected by outliers?
mean
If there was a line in the middle it would be mirrored to each other
Symmetric
What is standard deviation? What is the formula?
measure of how spread out the data is from the mean
Find the mode of the following set of numbers:
4, 2, 4, 3, 2, 2
2
Given data set: -3, 5, 10, 12, 14, 18, 24, 26, 31, 60
which of the values is the outlier?
60
What is the purpose of skewed?
To determine weather the mean or median is a better measure for the center
What is IQR?
a measure if how spread out the data is from the median
7, 16, 121, 51, 101, 81, 1, 16, 9, 11, 16
Find the mean, mode, median of this data
Mean= 39, 39.1, or 39 1/11
Mode= 16
Median= 16
Calculate the IQR of the following data
17, 18, 18, 19, 20, 21, 21, 23, 25
4
What is the overall shape of the graph called?
data distribution
What are outliers?
the data value that is significantly greater or lesser than other data values in a data set
Bonquisha's scores on her first four History tests were 80, 85, 88 and 95.
To get an A in the class, she needs to have an average of 90 or better.
What score must she make on the fifth test to get an A ?
Let x be the required score on the fifth test. Write an equation for calculating the mean with the unknown value.
Bonquisha needs to score a 98 or higher to get an A
explanation:
80 + 85 + 88 + 95 + x /5=90
simpliofy
348 + x / 5=90
Multiply both sides by 55
348+x=450
Subtract 348 from box sides
x=98
What Does IQR stand for
interquartile range
If the mean of the data is less then the median which way is it skewed?
skewed left