Memorization
what are the three measures of center?
Mean, Median, Mode
With the Data below find the percentile for 14.
10, 12, 11, 15, 11, 14, 13, 17, 12, 22, 14, 11
9/12 = 0.67
there are 9 values at or below 14
When will the standard deviation be zero?
A. 5,6,7,8,9
B. 4,3,5,6,4
C. 2,2,2,2,2
D. 12,23,49,45,34
C. 2,2,2,2,2
what are the four measures of spread?
IQR, Standard Deviation, Range, Variance
Given the set below,
1, 2, 3, 4, 5, 6, 7, 8, 9
find the following:
Q1 =
Median =
Q3 =
IQR =
Q1 = 2.5
Median = 5
Q3 = 7.5
IQR = 5
Which of the following variables are discrete variables?
A. Height of players in the WNBA in feet and inches
B. The battery life (time) of several new cell phone models
C. Distance between two cities
D. The volume of air in footballs used in the NFL
A. Height of players in the WNBA in feet and inches
What are the summary statistics that are resistant to outliers?
Median and IQR
A survey was taken asking whether people approved or disapproved of a mayor's actions while in office. The graph below shows the results for people in different age and gender groups.
Age Range is
Gender is
Approval percent is
Age range is categorical
Gender is categorical
Approval percent is quantitative
Angel has grades of 84, 65, and 75 on three exams. What grades must she make on the next exam to have an average of exactly 80 for the four exams?
A. 89
B. 96
C. 98
D. 100
B. 96
What is the difference between Right Skewed and Left Skewed?
Right Skewed: Mean > Median
Left Skewed: Median > Mean
Does the data below have an outlier?
10, 12, 11, 15, 11, 14, 13, 17, 12, 22, 14, 11
Yes at 22
For the data set below, find the interquartile range.
5, 4, 2, 5, 9, 3, 4, 5, 3, 1, 6, 7, 5, 8, 3, 7
A. 2.0
B. 85
C. 5.0
D. 3.5
D. 3.5
What is the Outlier test?
Q1 - 1.5(IQR)
Q3 + 1.5(IQR)
Determine which variable below are quantitative.
Hair Color
Speed of a car
Shapes
Household Income
Dog Breeds
Population
Ethnicity
Gender
Exam Scores
Speed of car
Household income
Population
Exam Scores
Is standard deviation resistant or non-resistant to extreme observations?
a) resistant
b) non-resistant
b) non-resistant