Find the mean of the following set of data:
13, 23, 21, 20, 21, 24, 18
What is the mean is 20
100
Explain each step that you would use to find the mean absolute deviation of a data set.
What is
1.) Find the mean of your data set (add all numbers, divide by the amount of numbers in your data set).
2.) Use your quotient (mean) and subtract that number from each number in your data set (if any numbers become negative, take away the negative sign).
3.) You should have a new data set, now find the mean of your new data set (add the numbers and divide by the amount of numbers in your data set).
4.) Your quotient (mean) is your mean absolute deviation.
100
Determine the sampling method.
Harry collected green balls in a bag. He drew two balls, of the five balls, out of the bag. What type of sampling method did he use?
What is simple random sample
100
Which survey most likely represents a random sample?
A. The teachers who attended college in KY
B. The basketball team to represent the students on the
football team
C. A survey of every 6th students who enters the school to
represent the student population
D. A survey of every 6th graders to represent the student
population
What is C. A survey of every 6th students who enters the school to represent the student population
100
Find the interquartile range for the data set:
12, 14, 11, 10, 9, 10, 9
What is the IQR = 3
- put the numbers in order from least to greatest
- find the median
- find the difference between the first quartile (9) and third quartile (12)
200
What is the mode:
10, 9, 4, 4, 8, 8, 8, 4, 7, 6, 11, 14, 27
What is 4 and 8
200
Find the mean absolute deviation of the following data set:
5, 6, 7, 4, 3
What is the MAD is: 1.2
200
Determine the sampling method.
Daisy wants to find out where the greatest number of people buy fast food for lunch. She surveys every fourth person on a random street where they get food for lunch regularly? What type of sampling method did she use?
What is systematic sample
200
The seventh grade Math class wants to conduct a survey to determine their favorite shoe brand. Which sampling of students would be representative of the population?
A. Ask the first five students that enter Math class.
B. Ask students’ family members.
C. Ask students with blue eyes.
D. Ask students to put names on separate cards and draw
10 names.
What is D. Ask students to put names on separate cards and draw 10 names.
200
Find the interquartile range, round to the nearest tenth if necessary:
5, 2, 4, 7, 4, 4, 1
What is 3
300
What is the range.
14, 8, 17, 21, 23 , 11, 3, 13
What is 20
300
The number of points Maggie has scored in each of the first 5 games of the basketball season are 14, 17, 17, 13, and 34. What is the mean absolute deviation for the number of points for Maggie's first 5 games?
What is 6.
300
What is the difference between population and sample?
Population is the whole group. Sample is part of a population.
300
What is a biased sample?
A sample that is not a true representation of the survey.
300
Mr. Douglas needs to find out which students at Fennel Middle School ride the bus to school. Which sample would be best to survey?
A. a boys PE class
B. a 6th grade math class
C. a technology class of mixed grades
What is C. a technology class of mixed grades
400
Frank has 3 nickels, 5 dimes, and 2 quarters. Find the mean, median, mode and range of the values of Frank's coins.
What is:
mean: 11.5 cents
median: 10 cents
mode: 10 cents
range: 20 cents
400
There are 7 animal shelters in the local area. The number of cats in each is 4, 6, 3, 7, 4, 5, and 20. What is the mean absolute deviation for the number of cats in shelters to the nearest tenth?
What is 3.7.
400
Shannon wants to find out which music group is the most liked by students in her school. As a sample, she asks the 10 girls on her basketball team.
Is this a biased or unbiased sample.
What is biased
400
Give an example of a systematic sample.
answers will vary
400
The teacher wants to have snacks for the students on a field trip. In order to purchase what the students actually like, the teacher asks some students what kind of snack they like best. Which would be the best sample to take?
A. every 10th student she sees all day
B. the first 10 students that walk into class
C. ask the students that show up to homework help afterschool
What is A. every 10th student she sees all day
500
What is the definition of the term mode?
What is the value or values that occur the most often in a set of data.
500
Find the mean absolute deviation, round to the nearest tenth.
23, 37, 33, 39, 29, and 31
What is 4.3
500
Give an example of a convenience sample.
answers may vary
500
A sample that is true or accurate.
What is valid.
500
The amount of rainfall (in inches) for each of the first 5 months of the year is 1, 3, 8, 4, and 4. What is the mean absolute deviation for the number of inches of rain for the first 5 months of the year?