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?
References the entire group when collecting data.
What is population?
7th grade: 1,000 students
Math: 5
P.E: 26
Choir: 19
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)?
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)?
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
DP:
Median:
Q1:
Q2:
IQR:
What is
DP: 18, 18, 18, 20, 21, 22, 23, 23, 24, 24
Median: 21.5
Q1: 18
Q2: 23
IQR: 5
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
DP:
Sum:
Mean:
Distance List:
M.A.D:
DP: 8
Sum: 435
Mean: 54.4
Distance: 6.4, 31.6, 39.4, 27.4, 36.4, 2.4, 48.6 = 192.2
M.A.D:24