Vocab 1
A characteristic of an individual in a data set.
What is a variable?
This measure of center is resistant to extreme values.
What is the median?
Create a stem and leaf plot for this data set.
22, 23, 23, 24, 24, 24, 25, 25, 25, 26, 26, 26, 27, 27, 28, 28, 29, 29, 29, 30, 30, 30, 31, 31, 31, 32
If you have a data set that is skewed left, what measure of center AND spread are most appropriate to describe the data set?
What is median and IQR?
Cinnamon went to the vet, and the vet reported that she was at the 47th percentile for her weight. How can we interpret this percentile compared to other dogs of her age/breed?
Cinnamon's weight is more that 45% of all dogs of her age/breed.
An individual observation that falls outside the overall pattern of the graph.
What is an outlier?
This measure of center is non-resistant to outliers.
What is the mean?
What are the parts of a box and whisker plot? Draw and example and label where the parts go.
min, Q1, Q2 (median), Q3, max
Mrs. Honeycutt will check your graph.
How do we calculate the IQR?
Double Points: What does IQR stand for?
What is Q3-Q1?
What is Interquartile Range?
On an ogive, if I want to find the value for the median, what percentage would I need to look at on the y-axis?
What is 50%?
This tells us what values the variable takes and how often it takes those values.
What is a distribution?
This measure of spread is resistant to extreme values.
What is the IQR?
Draw an example of a graph that is skewed right.
Mrs. Honeycutt will check your graph.
What measure of center AND spread are non-resistant to outliers?
What are the mean and standard deviation?
On an ogive, if I wanted to find the values for Q3 and Q1, what percentages would I need to look at?
What is 25% for Q1 and 75% for Q3?
Describes a variable that takes numerical values where arithmetic operations make sense.
What is a quantitative variable?
This measure of spread is non-resistant to extreme values.
What is the standard deviation?
Suppose we have this data:
Freshman: 30
Sophomores: 50
Juniors: 100
Seniors: 20
What percent of students here are seniors?
How do we calculate the range of a data set?
What is max - min?
For this set of data, what is the class width if I want to have 6 bins total on a histogram?
99, 99, 101, 102, 103, 105, 105, 106, 106, 108, 108, 109, 111, 114, 115, 116, 117, 117, 119, 120, 122, 123, 125, 142
What is (142-99)/6 = 7.2 or 7 bins?
Describes a variable that places individuals into one of several groups.
What is categorical?
kth percent of data falling below and specific value.
What is a percentile?
When looking at a modified boxplot, what do we do to denote outliers?
What is draw a dot or star off to the side of the boxplot?
How do we determine if a data point is an outlier?
Hint: Can you name the formula we used for lower and upper outliers?
lower: Q1 - (1.5 x IQR)
upper: Q3 + (1.5 x IQR)
Create a histogram from this set of data. Use class widths from the previous question.
99, 99, 101, 102, 103, 105, 105, 106, 106, 108, 108, 109, 111, 114, 115, 116, 117, 117, 119, 120, 122, 123, 125, 142
Hint: Make a frequency table first. Then use your frequency table to create your histogram.
Mrs. Honeycutt will check your frequency table and histogram.