Mean
Median
Mode
Range
Populations and Representative Samples
100
This is the definition of mean.
What is the sum of a set of values divided by the number of values?
100
This is the definition of median.
What is the middle value when the values are written in numerical order?
100
This is the definition of mode?
What is the value that occurs most often in a data set?
100
This is the range of the following data set: 10, 8, 9, 8, 5, 5, 8, 7.
What is 5?
100
The school principal wants to determine what is the student's favorite meal in the cafeteria. He surveys 100 of the school's 350 students. What is the population of this study? What is the sample?
Population: 350 students in the school
Sample: 100 students surveyed
200
This is the mean of the following data set: 14, 17, 9, 2, 4, 10, 5, 3.
What is 8?
200
This is the median of the following data set: 7, 1, 2, 6, 1, 7, 5.
What is 5?
200
This is the mode of the following data set: 8, 13, 8, 4, 11, 4, 2, 6.
What is 4?
200
This is the range of the following data set: 0, 7, 1, 2, 6, 1, 7, 5.
What is 7?
200
Of the 1081 members of the town, 271 attended the Fall Harvest Festival. What is the population of this study? What is the sample?
Population: 1081 members of the town
Sample: 271 that attended the Fall Harvest Festival
300
This is the mean of the following data set: 91, 150, 80 71, 74, 81, 83.
What is 90?
300
This is the median of the following data set: 11, 8, 10, 11, 10, 7, 5, 10.
What is 10?
300
This is the mode of the following set: 91, 150, 80, 71, 74, 81, 80, 77.
What is 80?
300
This is the range of the data set: 5, 11, 9, 5, 25, 2, 10, 8, 9, 9.
What is 23?
300
Sarah wants to determine how many hours students at JAMS spend exercising per day. She decides to ask the girls' basketball team how many hours they exercise per day. Is this a representative sample? Explain.
The girls' basketball team will exercise more than the average student. They need to ask a wider, more representative, portion of the population.
400
This is the mean of the following data set: 154, 163, 119, 156, 150, 98.
What is 120?
400
This is the median of the following data set: 26, 22, 10, 12, 16, 28.
What is 19?
400
What is the mode for each day?
Day 1: 3 and 5
Day 2: 5
400
What is the range of each group?
Group A: 2.5
Group B: 3
400
Scott wants to know how often students in 8th grade do their homework each week. He decided to ask the members of the National Junior Honor Society how often they do their homework. Is this a representative sample? Explain.
National Junior Honor Society students may be in 6th, 7th, or 8th grade. They spend more time doing their homework than the average student.
500
What number is the mean of each day?
Day 1: 3.45
Day 2: 3.7
500
What is the median for each group?
Group A: 3
Group B: 3.5
500
This is the mode of the following data set: 142, 131, 135, 148, 139, 146, 133, 137, 145, 141
What is none?
500
What is the Interquartile Range for each Group?
Group A: 1.5
Group B: 2
500
Derek used a random sample of seventh graders to determine that 14 out of 20 seventh graders have cell phones. If there are 150 seventh graders in the school, estimate the number of seventh graders who have cell phones.
105