# 1.14 Sampling and data: data collection lab i

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This lab allows students to practice and demonstrate techniques used to generate systematic samples. Students will have the opportunity to create relative frequency tables and interpret results based on different data groupings.

Class Time:

Names:

## Student learning outcomes

• The student will demonstrate the systematic sampling technique.
• The student will construct Relative Frequency Tables.
• The student will interpret results and their differences from different data groupings.

## Movie survey

Ask five classmates from a different class how many movies they saw last month at the theater. Do not include rented movies.

1. Record the data
2. In class, randomly pick one person. On the class list, mark that person's name. Move down four people's names on the class list. Mark that person's name. Continue doing this until you have marked 12 people's names. You may need to go back to the start of the list. For each marked name record below the five data values. You now have a total of 60 data values.
3. For each name marked, record the data:
 ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______

## Order the data

Complete the two relative frequency tables below using your class data.

Frequency of number of movies viewed
Number of Movies Frequency Relative Frequency Cumulative Relative Frequency
0
1
2
3
4
5
6
7+
Frequency of number of movies viewed
Number of Movies Frequency Relative Frequency Cumulative Relative Frequency
0-1
2-3
4-5
6-7+
1. Using the tables, find the percent of data that is at most 2. Which table did you use and why?
2. Using the tables, find the percent of data that is at most 3. Which table did you use and why?
3. Using the tables, find the percent of data that is more than 2. Which table did you use and why?
4. Using the tables, find the percent of data that is more than 3. Which table did you use and why?

## Discussion questions

1. Is one of the tables above "more correct" than the other? Why or why not?
2. In general, why would someone group the data in different ways? Are there any advantages to either way of grouping the data?
3. Why did you switch between tables, if you did, when answering the question above?

can someone help me with some logarithmic and exponential equations.
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
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im all ears I need to learn
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right! what he said ⤴⤴⤴
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im not good at math so would this help me
yes
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I'm not good at math so would you help me
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what is the problem that i will help you to self with?
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Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
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China
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many many of nanotubes
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Yasmin
what is the function of carbon nanotubes?
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In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
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anybody can imagine what will be happen after 100 years from now in nano tech world
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after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
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name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
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how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
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silver nanoparticles could handle the job?
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not now but maybe in future only AgNP maybe any other nanomaterials
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can nanotechnology change the direction of the face of the world
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
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how did you get the value of 2000N.What calculations are needed to arrive at it
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