Identify the population and the sample size for the below question. Tell if the data is a statistic or a parameter.
A survey of 1353 American households found that 18% of the households own a
computer.
What is population is all American Households.
Sample Size: 1353
Statistic
100
The accompanying box-and-whisker plot represents the cost, in dollars, of twelve CD’s.
a) What is the range of the costs of the CD’s?
b) What is the median?
c) Which cost represents the 100th percentile?
d) How many CD’s cost between $14.50 and $26.00?
e) How many CD’s cost less than $14.50?
What is
a. 22
b. 20.5
c. 26
d. 50%
e. 25%
100
Given the data construct a two way table:
Eighty boys and girls were surveyed if they liked to dance. Half of the 40 girls reported that they liked to dance. Thirty of those polled liked to dance.
Show the teacher your two way table.
100
1. A sports writer wants to know which is the most popular college basketball team. Which group of people would give her the least biased answer?
A. every 4th person entering a college dining all
B. every 4th student at a freshman orientation
C. every 4th person entering a grocery store
What is C
200
Define Median and Mode
Median is the middle number of a data set
Mode is the number that occurs the most in a set of data
200
A recent survey of 2625 elementary school children found that 28% of the children
could be classified obese.
Population: Elementary school children
Sample Size 2625
Statistic
200
6) A movie theater recorded the number of tickets sold daily for a popular movie during the month of
June. The box-and-whisker plot shown below represents the data for the number of tickets sold, in
hundreds.
Which conclusion can be made using this plot?
(1) The second quartile is 600.
(2) The mean of the attendance is 400.
(3) The range of the attendance is 300 to 600.
(4) Twenty-five percent of the attendance is between 300 and 400.
What is 4
200
Convert the table to a frequency table. CALCULATE FREQUENCY BY ROWS.Interpret Results.
See teacher.
200
Identify the three things that create bias in a survey.
What is
1. Convenience sampling
2. Voluntary Response
3. Small Sample Size
300
What is the interquartile range and how does it help with calculating outliers?
What is it is the range between Q1 and Q3. An outlier is any number that is more than 1.5 times the interquartile range away from a data point.
300
Identify which information in the problem below is concerned with the sample and what is concerned with the population:
A scientist is studying geese he tags 60 geese and releases them into the wild he then recaptures 100 geese, 12 of which are tagged.
What is
Population is 60 out of the total population were tagged
Sample is 12 out of 100 geese were tagged
300
7) The accompanying box-and-whisker plots can be used to compare the annual incomes of three
professions.
Based on the box-and-whisker plots, which statement is true?
(1) The median income for nuclear engineers is greater than the income of all musicians.
(2) The median income for police officers and musicians is the same.
(3) All nuclear engineers earn more than all police officers.
(4) A musician will eventually earn more than a police officer.
What is 2
300
CALCULATE FREQUENCY BY COLUMNS. Interpret results.
See teacher
300
Give an example of the three things that create bias in a survey.
Answers will vary.
400
What is MAD, what does it tell you about a data set, and how do you calculate it?
What is Mean Absolute Deviation.
It is a measure of spread or how far the data is from the mean.
You find the mean and subtract each data point from the mean. Take the absolute values of your solutions add them together and divide by the number of data points in the set.
400
Estimate the population for the below scenario:
A scientist tags 175 cheetahs and releases them into the wild. He then recaptures 100 cheetahs, 35 of which are tagged. Estimate the population.
What is 500
400
8) The data set 5, 6, 7, 8, 9, 9, 9, 10, 12, 14, 17, 17, 18, 19, 19 represents the number of hours spent on
the Internet in a week by students in a mathematics class. Which box-and-whisker plot represents
the data?
What is 2
400
Calculate Frequency Table by TOTAL.
See teacher.
400
Identify the problems with the below research proposal:
I want to determine how many middle school students in the U.S. play video games. I plan to post a survey on Mrs. Homerding's website and request for students in my class to fill it out.
What is
Small Sample Size: One class does not represent the entire US.
Voluntary Response: You are requesting the students to fill out the online survey
Convenience Sampling: Only students with the internet will be able to respond you are eliminating part of your population
500
What is the five data summary to create a box and whisker plot?
Give the five data summary for the below data set:
1,2,3,4,5,6, 16
IDENTIFY ANY OUTLIERS!
What is
Lower Extreme (minimum): 1
Q1: 2
Median: 3.5
Q3: 5
Upper Extreme: 6
Outlier: 16
500
A scientist is estimating the population of wild boars on fort stewart. He tags 15 wild boars and releases them into the wild. He then recaptures 50 wild boars, 5 of which were tagged.
Identify the population:
Estimate the population:
Identify the sample size:
What is wild boars on fort stewart
150
Sample size 50
500
Give the five necessary statistics for the data set below and construct a box and whisker plot:
7,14,10,12,5,19,37,2
DONT FORGET ABOUT POSSIBLE OUTLIERS
What is
Min: 2
Q1: 6
Median: 11
Q3: 16.5
Max: 19
Outlier: 37
500
Which representation is most helpful for the below questions:
1. What percentage of Boys like to dance?
2. What percentage of participants were boys who like to dance?
3. What percent of those surveys like to dance?
4. What percent of those who like to dance were girls?
FOR BONUS POINTS GIVE ME THE VALUES
Answers will vary.
500
Create a research proposal as free of bias as possible. Is it a survey or a census?
What is a census because this is the only way to be sure that you represent your entire population. It would have to mandatory that everyone in the population took the survey. It would have to be delivered so that everyone in the population was able to respond (may need to be verbally read alound, can not be delivered via the internet)