Measures of Central Tendency
What are the five parts of a box-and-whisker plot?
lower extreme, upper extreme, lower quartile, upper quartile, and median.
In a recent survey, 4 out of 5 people chose Crest as their favorite toothpaste. What percent of the people in the survey chose Crest?
80%
Which data display breaks the data set up into 25% sections?
Box-and-whisker plot
How many outfits can be made from 3 pairs of pants, 5 shirts, 4 pairs of socks and 7 pairs of shoes?
3x5x4x7 = 420
A box-and-whisker plot breaks your data down into ___ sections, each representing ___ % of your data.
4, 25
In a survey done last week about favorite Olympic sports, 32% of the people chose Curling. If the survey asked 500 people, how many people chose curling?
160 people
Suppose you are making a code for a combination lock with 4 digits and the digits may repeat.
How many possible codes are there for the lock?
10,000
How do you find the median of a data set that has an even number of data points.
List the data in order from least to greatest. Take the two numbers in the middle and find the mean.
In a box-and-whisker plot, the LE= 18, UE= 42, med.= 33, LQ= 24, an UQ= 38. What percent of the data fall below 24?
25%
The numbers 1- 10 are your sample space. Find the P(choosing a 6)as a fraction and a percent.
1/10, 10%
A card is drawn from a deck of eleven cards with the letters PROBABILITY. What is the probability of drawing two cards, without replacing, of P(B, B)?
2/11 x 1/10 = 1/55
If there are 5 multiple choice questions on a test and each question has 4 choices, how many possible combinations of answers are possible.
1,024
Find the mean, median, and mode of the following data set: 12, 13, 13, 15, 17, 19, 22, 22, 22, 24, 27, 29.
Mean= 19 7/12 Median= 20.5 Mode= 22
Define Interquartile Range.
The interquartile range, or IQR, is the difference between the Upper and Lower quartiles in a data set. It shows the spread of the middle 50% of the data.
The table shows the results of rolling a die.
What is the experimental probability of rolling a 4?
1 - // 4 - ///
2 - / 5 - ///
3 - //// 6 - //
1/5
A card is drawn from a deck of eleven cards with the letters PROBABILITY. What is the probability of drawing two cards, with replacing, of P(vowel,I)?
4/11 x 2/11 = 8/121
Stuey knows he makes 80% of the Penalty shots he takes. Theoretically, how many will Stuey make on his next 20 Penalty shots.
16
Lauren analyzed some data from a survey about average time teens were allowed to spend on the internet on school nights. She found the mean to be 124 minutes, the median to be 121.5 minutes, and the mode to be 133 minutes. If Lauren is trying to convince her parents that she should be able to spend more time on the computer at night, which measure of central tendency should she use, and why?
She should use the mode, because that is the biggest number here. Lauren could legitimately say that "most" teens are allowed to spend 133 minutes per night on the computer.
Make a box-and-whisker plot for the following set of temperatures recorded this weekend: 38, 45, 40, 33, 39, 50, 42, 40, 37.
LE=33 LQ=37.5 Med=40 UQ=43.5 UE=50
What is the theoretical probability of rolling a 4 on a die?
1/6
Compound probability where the outcome of the first event does not effect the outcome of the second event is called_____________________________.
independent
Make a back-to-back stem-and-leaf plot for the following set of Test scores: Boys= 88, 89, 93, 67, 88, 79, 81, 84, 100, 92. Girls= 75, 61, 100, 100, 89, 100, 82, 70, 71, 73. Hold your answer up when done so I can check!
Refer to smartboard.