Definitions
Identify the population for the below question. A survey of 1353 American households found that 18% of the households own a computer.
What is population is all American Households.
Find the mean of the following set of data: 13, 23, 21, 20, 21, 24, 18
What is the mean is 20
How do you find the MAD
Find the mean
Find the distance from each data point and the mean.
Find the mean again of the distances
1.A sports writer wants to know which is the most popular college basketball team. Which group of people would give her the least biased answer?
A. every 4th person entering a college dining all
B. every 4th student at a freshman orientation
C. every 4th person entering a grocery store
What is C
A recent survey of 2625 elementary school children found that 28% of the children could be classified obese.
Population: Elementary school children
What is the mode: 10, 9, 4, 4, 8, 8, 8, 4, 7, 6, 11, 14, 27
What is 4 and 8
Find the mean absolute deviation of the following data set: 5, 6, 7, 4, 3
What is the MAD is: 1.2
What sample would be the best to represent the population?
A gaming website wanted to find out which console its visitors owned.
A. all of the website visitors
B. visitors over 24
C. Visitors with an 'e' in their user name.
C. Visitors with an 'e' in their user name
What is a population?
The group of people or items you want to find more information about.
What is the best sample?
A cookie company has a new logo and they want to see if people like the new design.
A. Every person in the state of Kentucky
B. A selection of shoppers at grocery stores across the US.
C. The students at a local elementary school.
D. An online survey for the people who visit their website.
B
What is the median: 10, 9, 4, 4, 8, 8, 8, 4, 7, 6, 11, 14, 27
median 8
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.
Identify the problem with the survey below?
A survey company was trying to see if people in Wisconsin thought the pollution was too high. The surveyed a selection of people who live in small towns.
Typically there is more pollution is higher in big cities. They should have surveyed people all over the WI including large cities and small towns.
What are the three important things you need to make sure that you have a representative sample?
2. similar shape
3. similar spread
What is the population for the following situation?
A restaurant chain wanted to find out how the customer experience was in the store.
customers at the restaurant
Frank has 3 nickels, 5 dimes, and 2 quarters. Find the mean of the values of Frank's coins.
mean: 11.5 cents
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
Identify the problems with the below research proposal: I want to determine how many middle school students in the U.S. play video games. I plan to post a survey on Mrs. Runyon's website and request for students in my class to fill it out.
it is not random
not every middle school student in the US got a chance to be surveyed