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- Sampling and data
- Sampling and data: homework
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. Labs changed to incorporate mini-tabs.
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 |
0.45 |
|
| 1 |
18 |
|
|
| 3 |
|
|
0.93 |
| 6 |
3 |
0.05 |
|
| 7 |
1 |
0.02 |
|
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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
Insurance companies are interested in the average health costs each year for their clients, so that they can determine the costs of health insurance. 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
The clients of the insurance companies
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B
A group of the clients
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C
The average age of the clients
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D
The average age of the sample
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E
= the age of one client
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F
A value for
, such as 34, 9, 82, etc.
Questions & Answers
A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what are the types of wave
Maurice
fine, how about you?
Mohammed
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
Who can show me the full solution in this problem?
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Source:
OpenStax, Collaborative statistics (with edits: teegarden). OpenStax CNX. Jul 20, 2009 Download for free at http://legacy.cnx.org/content/col10561/1.3
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