Pop. & Samp
A subset of an entire group.
What is a sample?
Once a sample has been collected from a population, an inference about the entire population can be made by setting up a proportion.
What is population inferences?
Ordering the data from least to greatest.
What is median?
A way of describing how spread out the data is or how much the data deviates from the center.
What is measure of variability?
Data display with points on a number line.
What is a dot plot?
References the entire group when collecting data.
What is population?
7th grade: 1,000 students
Math: 5
P.E: 26
Choir: 19
The number of students surveyed:
What is 50 students?
Dividing by the number of data points.
What is mean?
A measure of variability that splits the data into four equal sized quartiles. It represents the middle 50% if the data.
What is Interquartile Range (IQR)?
Data display that shows the IQR.
What is a box-and-whisker plot?
Everyone in the population must have an equal chance of being selected.
What is random sample?
7th grade: 1,000 students
Math: 5
P.E: 26
Choir: 19
Percentage of students surveyed that chose Choir.:
What is 38%?
Determining the fair share.
What is mean?
The average distance that the data points in a set of data are from the mean.
What is Mean Absolute Value (M.A.D)?
Data display that shows data in intervals or bins.
What is a histogram?
Seniors at River Springs Middle School.
What is a population?
7th grade: 1,000 students
Math: 5
P.E: 26
Choir: 19
Students that are expected to choose Math.:
What is 100 students?
24, 18, 20, 13, 25, 23
Mean
What is 20.5?
Number of Students in Kindergarten Class:
20, 18, 21, 18, 22, 24, 18, 23, 23, 24
Median:
Q1:
Q2:
IQR:
What is
Median: 21.5
Q1: 18
Q2: 23
IQR: 5
Data display that uses proportions to find the size of each section.
Students who participate in Sports at River Springs Middle School.
What is a population?
7th grade: 1,000 students
Math: 5
P.E: 26
Choir: 19
Students that are expected to choose P.E.:
What is 520 students?
22, 24, 17, 26, 21, 18, 29, 27
Median
What is 22?
Mean Absolute Deviation:
List: 48, 86, 15, 27, 18, 52, 86, 103
M.A.D:
What is M.A.D: 24
The 5 number summary.
What is minimum, Q1, median, Q3, and maximum?