Sampling Techniques
A researcher stands at the mall entrance and surveys the first 100 people she sees.
Convenience Sampling
A weatherman records the amount of rain that falls each day in Sullivan for a year. What kind of graph should this data be displayed on?
Time Series Graph
Find the range of the data set.
10 12 8 17 2 21 0 23
23
Consists of all subjects being studied.
Population
What is Mrs. Haynes's favorite color?
A. Purple
B. Blue
C. Yellow
D. Pink
A. Purple
A researcher assigns every student at SHS a number, and then she uses a random number generator to select 100 students to survey.
Random Sampling
When making a Pareto chart, how should the data be arranged?
Highest to Lowest Frequency
Find the midrange of the data.
10 12 8 17 2 21 0 23
11.5
Quantitative variables that assume values that can be measured.
Continuous variables
Where did Mrs. Haynes go to college?
A. SEMO
B. UCM
C. MSU
D. Mizzou
D. Mizzou
Every 10th McDonald's customer is asked how much their meal costs.
What are the boundaries for a class with limits 120 - 139?
119.5 - 139.5
The variance of a data set is 58. Find the standard deviation.
7.62
Branch of statistics that generalizes from samples to populations and makes predictions.
Inferential Statistics
When Mrs. Haynes was younger, she wanted to grow up to be a(n):
A. Teacher
B. Astronaut
C. Meteorologist
D. Doctor
C. Meteorologist
A farmer divides his corn field into 10 rows. Using a random number generator, he picks one row and samples every crop in that row.
Cluster Sampling
What is the midpoint of the class with limits 45 - 68?
56.5
The average score on a statistics test was an 86 with a standard deviation of 5. Find the z-score for a score of 73.
-2.6
The variable that is manipulated by the researcher in an experimental study.
Independent Variable
What is Mrs. Haynes's maiden name?
A. Blankenship
B. York
C. Dierker
D. Light
B. York
Mr. Davis randomly selects two students from each 1st block class to participate in a school climate survey.
Stratified Sampling
Suppose you are making a pie graph to represent shirt color. Out of 50 students, 15 are wearing a black shirt. How many degrees should this angle measure on your pie graph?
108°
Find the IQR for the following data set.
0 5 9 12 15 18 21 23 26
15
The number of standard deviations that a data value lies above or below the mean.
Z-Score
What year did Mrs. Haynes graduate high school?
2014