Data displays
Which graph is best for showing parts of a whole?
pie chart
a coin is flipped. what is the probability of tails
1/2
what does range measure?
the difference between the highest and lowest value
what is 50% of 240?
120
what is a sample ?
a smaller group selected from a population
which graph is best for showing changes over time?
Line graph
a dice is rolled. what is the probability of getting a number greater than 4 ?
2/6=1/3
which measure of spread is used with box plots
interquartile range (IQR)
a student got 18 questions Correct out of 24. what percentage did they get correct?
what is a population?
The entire group being studied
what does the height of a bar represent in a bar graph?
The frequency or amount
a bag contains 5 green and 15 yellow marbles. what is the probabilty of drawing a green marble
5/20=1/4
what is the IQR if Q1=15 and Q3=35?
20
a shirt originanlly costs 40$ and its on sale for 25% off. How much is the discount?
10$
what is a variable?
a characteristic that can take different values
which graph is used to display numerical data in intervals
histogram
a card id drawn from a deck. what is the probability of drawing a face card
12/52=3/13
what does a larger standard deviation indicate?
more spread in the data
a towns population increased from 2000 to 2300. What was the percent increase
15%
what is an outlier?
a value that is usually higher or low compared to the rest of the data
what graph uses quartiles and the median to summarize data
box plot
two coins are flipped. what is the probability of getting two heads ?
1/4
Find the range of
5,8,12,18,20
15
A test score decreased from 90 to 72. what was the percent decrease ?
20%
what is correlation?
a measure of the relatonship between two variables