More Skittles?
Overheard at lunch: "Anyone want to take this survey about whether we should wear uniforms to school? The district wants feedback before they do it!"
What is the Q2 of this data?
10, 12, 12, 14, 15, 15, 17
14
What is the mode of this data?
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
There is no mode
How many degrees of a circle would a category take up if it was 25% of the data collected?
90 degrees
Asking people about their favorite sport would be a quantitative or categorical variable?
categorical variable
Oh shoot! I forgot to collect my survey data! So I use my advisory class to take my survey before Bridge.
Convenience Sampling
If the lower bound is 2.5, what would be an outlier in the data below?
3, 5, 7, 10, 23, 4, 5, 7, 6, 4, 4, 3
There isn't an outlier.
Mode
If Rae's data about favorite color showed the following:
blue 30 grey 20 black 29 white 21
What percentage is black?
29%
In order to be Quantitative, the answers to the question must be able to be ... what?
Counted, calculated or measured
This happens when a group of the population is left out or targeted when collecting data.
Sampling Bias
What is the Q1?
1, 1, 2, 2, 3, 3, 6, 6, 7
1.5
What is the range of this data?
32, 12, 24, 34, 31, 13, 24, 12, 15, 32, 12
22
If Rae's data about favorite color showed the following:
blue 30 grey 20 black 29 white 21
How many degree's of the circle would grey take up?
72
How many categorical variables are in this list?
Favorite music
Favorite number
Favorite vehicle
3
Subjects are put into groups based on traits, then a random number is selected from the created groups
Stratified Sampling
How do you find the upper bound?
Q3+(1.5*IQR)
What is the mean for the following data?
24, 25, 25, 42, 42, 42, 59, 59, 60
42
If the total of FWPS budget was $491 million dollars, what percentage would transportation be if they budgeted $147.3 million dollars for it?
30%
If you asked someone what numbers were on their license plate, would that be quantitative or categorical.
Categorical, it's random
This type of sampling is when you roll a die or use a device to chose a random first number to sample, but you already have a fixed number after that.
Systematic Sampling
The Q3 represents what percentile of the data collected?
75%
What central measure would best represent the center of the following data and why?
3, 4, 4, 5, 5, 7, 8, 8.8, 8.9, 25
Median because there is an outlier.
If the total of FWPS budget was $491 million dollars, how many degrees of a pie chart would transportation take up if they budgeted $147.3 million dollars for it?
108 degrees
Give an example of a question that would get a categorical answer that is a number.
answer varies