Vocabulary
Population and Samples
Mean, Median, and Mode
Inference
Box & Whisker Plots
100
What is the difference between a sample and a population?
A sample is part of a population.
100
A school takes a poll to find out what students want to eat at lunch. 70 students are randomly chosen to answer the poll questions. What is the population?
Students at the school.
100
Find the median. 48, 55, 67, 67, 69, 70, 75, 77
68
100
Herald is keeping track of eagles. To do so, he put tags on 25 eagles and released them. Later, he catches 120 eagles; 16 eagles were tagged. Find the best estimate for the Eagle population.
188
100
What part of data falls in each quartile of a box and whisker plot?
25% or 1/4
200
What is bias?
A preference for a certain outcome.
200
A researcher was interested in the effectiveness of a given learning program in preparing 100 male college seniors from five different schools for the LSAT. What is the sample? A. five different schools B. the LSAT C. 100 college students D. 100 male college seniors from five different schools
D. 100 male college seniors from five different schools
200
A data set with two modes is called...
Bimodal
200
Scientists in the jungle want to find the best estimate for the lion population. They tagged and released 20 lions as part of a research project. Later, they found 160 lions, 8 of which were tagged. Find the best estimate of population.
400
200
How do you find the Interquartile Range?
The difference between the LQM and the UQM.
300
What is a census?
Survey of an entire population.
300
A researcher was interested in the effectiveness of a given learning program in preparing football players from five different teams for a new play-memorizing system. They will speak to 25 players from each team. What is the population? A. professional athletes B. five different teams C. 25 football players D. football players
B. five different teams
300
What is the median of the following numbers? 10, 39, 71, 42, 39, 76, 38, 25
39.
300
In a school, 60 students were randomly chosen and were surveyed about their favorite subject. Of the 60 students, 24 students chose math as their favorite subject. Based on the survey results, about how many of the 350 total students at the school would be expected to choose math as their favorite subject? A. 40 B. 84 C. 140 D. 314
C. 140
300
What is the Interquartile Range? 48, 55, 67, 67, 69, 70, 75, 77
11.5
400
What three things must a sample be to provide valid data?
Adequate, Representative, Random
400
The school cafeteria manager wants to take a survey to find out which fruit is preferred by most of the students at the school. Which method would give the BEST representative sample? A. survey 10 members of the school choir B. pick 5 classes and choose 10 students from each class C. survey every 10th student who eats in the cafeteria at lunchtime D. pick every 10th student who is listed on the student roll for the school
D. pick every 10th student who is listed on the student roll for the school
400
The mean of four numbers is 71.5. If three of the numbers are 58, 76, and 88, what is the value of the fourth number?
64.
400
In a survey of 500 teenagers, a soft drink company found that 268 teens choose the company’s brand of soft drink as their favorite. What valid claim can the company make? A. More parents buy the company’s brand than any other brand. B. Teens choose the company’s soft drink 2 to 1 over other brands. C. Over half of the teens surveyed prefer the company’s soft drink. D. More than 50% of soda drinkers choose the company’s brand as their favorite soft drink.
C. Over half of the teens surveyed prefer the company’s soft drink.
400
What percent of the data falls within the IQR of the following data set? 6,12,8,15,9,7
50%
500
At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision? A. to randomly ask 8th grade students who went on a field trip last year B. to randomly choose some 7th grade students to select a location C. to ask all 7th grade teachers and administrators for a location D. to ask the student council to choose a location
B. to randomly choose some 7th grade students to select a location
500
Kyrie is trying to calculate the minimum grade he can receive on his math final to maintain an average of an 85%. His current test grades are 82%, 94%, 72%, 78%, and 93%. If they are all weighted equally, what is the minimum grade Kyrie can earn to meet his goal? A. 85% B. 91% C. 83.5% D. 6%
B. 91%
500
Michael works at a candy cane factory and when randomly checking 75 candy canes he found 14 were broken. How many broken candy canes would he expect to find if he checked 825 candy canes?
154
500
In a data set with 16 data points, how many data points would fall below the UQM?
12
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