Representing Data
(Ms. Talbert will draw it)
Pie chart/circle graph
What is the formula for a z-score?
(x - mean)/standard deviation
What's another word for "normal" curve?
bell curve
What is another word for average?
mean
What is Ms. Talbert's favorite holiday?
Christmas
Every stem-and-leaf plot must have a _ _ _.
key
The average book length at a library is 350 pages with a standard deviation of 100. Find the z-score of a book that is 80 pages long.
z = -2.7
In a normal distribution, what percentage of data is within 2 standard deviations of the mean?
95%
How do you find the mean (by hand) of a given data set?
add all the numbers up, divide that by the number of values in the data set
In the movie Home Alone, Kevin is left home alone as his family attempts to travel to what city?
Paris
This type of graph shows how data changes over time.
line graph
DOUBLE JEOPARDY!
Joe scored a 92% on his exam. The class average was an 82% and the standard deviation was 4. Find Joe's z-score.
z = 2.5
IQ scores are normally distributed with a mean of 100 and standard deviation of 15. What percentage of people have an IQ below 85?
16%
How do you find the median (by hand) of a given data set?
Include what you would do if there were two numbers in the middle.
Put all the numbers in order from least to greatest, then find the number in the middle. If there are two numbers in the middle, add them up and divide by two.
Name all of Santa's reindeer.
Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner, Blitzen, and Rudolph
DOUBLE JEOPARDY!
What is the main/most obvious difference between a histogram and a bar graph?
In a bar graph, the bars are separated. In a histogram, the bars are next to each other.
Teenagers spend an average of 8 hours on their phone each day with a standard deviation of 2.4. Find the z-score if you spend 10.4 hours on your phone on a given day.
z = 1
IQ scores are normally distributed with a mean of 100 and standard deviation of 15. What percentage of people have an IQ between 85 and 130?
81.5%
What does this symbol represent:
(Ms. Talbert will write the symbol on the board)
the mean
When is Mrs. Holbrook's birthday?
TODAY! Happy birthday, Mrs. Holbrook! :)
What are the 6 must-haves for all graphs?
Title, label x-axis, label y-axis, all intervals must be equal, categories labeled, colorful when needed
What does a z-score tell us?
how many standard deviations a value is from the mean
Draw and label a normal curve. Include all 7 labels and all 8 percentages.
(check answer)
What does this symbol represent:
(Ms. Talbert will write the symbol on the board)
standard deviation
DOUBLE JEOPARDY!
What other math course does Ms. Talbert teach?
Algebra 1