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- Collaborative statistics homework
- Sampling and data
- Homework (modified r. bloom)
This module presents students with a number of problems related to statistical sampling and data. In particular, students are asked to demonstrate understanding of concepts such as frequency, relative frequency, and cumulative relative frequency, random samples, quantitative vs. qualitative data, continuous vs. discrete data, and other key terms related to sampling and data. The module is based on the module Sampling and Data: Homework from the textbook collection Collaborative Statistics by Susan Dean and Dr. Barbara Illowsky; additional problems have been added to the original module.
For each item below:
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I
Identify the type of data (quantitative - discrete, quantitative - continuous, or qualitative) that would be used to describe a response.
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Ii
Give an example of the data.
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A
Number of tickets sold to a concert
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B
Amount of body fat
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C
Favorite baseball team
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D
Time in line to buy groceries
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E
Number of students enrolled at Evergreen Valley College
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F
Most–watched television show
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G
Brand of toothpaste
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H
Distance to the closest movie theatre
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I
Age of executives in Fortune 500 companies
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J
Number of competing computer spreadsheet software packages
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A
quantitative - discrete
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B
quantitative - continuous
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C
qualitative
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D
quantitative - continuous
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E
quantitative - discrete
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F
qualitative
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G
qualitative
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H
quantitative - continuous
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I
quantitative - continuous
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J
quantitative - discrete
Fifty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:
Part-time student course loads
| # of Courses |
Frequency |
Relative Frequency |
Cumulative Relative Frequency |
| 1 |
30 |
0.6 |
|
| 2 |
15 |
|
|
| 3 |
|
|
|
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A
Fill in the blanks in the table above.
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B
What percent of students take exactly two courses?
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C
What percent of students take one or two courses?
Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below:
Flossing frequency for adults with gum disease
| # Flossing per Week |
Frequency |
Relative Frequency |
Cumulative Relative Freq. |
| 0 |
27 |
0.4500 |
|
| 1 |
18 |
|
|
| 3 |
|
|
0.9333 |
| 6 |
3 |
0.0500 |
|
| 7 |
1 |
0.0167 |
|
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A
Fill in the blanks in the table above.
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B
What percent of adults flossed six times per week?
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C
What percent flossed at most three times per week?
A fitness center is interested in the average amount of time a client exercises in the center each week. Define the following in terms of the study. Give examples where appropriate.
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A
Population
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B
Sample
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C
Parameter
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D
Statistic
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E
Variable
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F
Data
Ski resorts are interested in the average age that children take their first ski and snowboard lessons. They need this information to optimally plan their ski classes. Define the following in terms of the study. Give examples where appropriate.
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A
Population
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B
Sample
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C
Parameter
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D
Statistic
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E
Variable
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F
Data
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A
Children who take ski and snowboard lessons
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B
A group of these children
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C
The population average
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D
The sample average
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E
= the age of one child who takes the first ski or snowboard lesson
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F
A value for
, such as 3, 7, etc.
A cardiologist is interested in the average recovery period for her patients who have had heart attacks. Define the following in terms of the study. Give examples where appropriate.
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A
Population
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B
Sample
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C
Parameter
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D
Statistic
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E
Variable
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F
Data
Questions & Answers
what does the ideal gas law states
Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
what is the change in momentum of a body?
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
physics, biology and chemistry
this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you.
Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
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Source:
OpenStax, Collaborative statistics homework book: custom version modified by r. bloom. OpenStax CNX. Dec 23, 2009 Download for free at http://legacy.cnx.org/content/col10619/1.2
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