This module provides a lab of Linear Regression and Correlation as a part of Collaborative Statistics collection (col10522) by Barbara Illowsky and Susan Dean.

Class Time:

Names:

Student learning outcomes:

The student will calculate and construct the line of best fit between two variables.

The student will evaluate the relationship between two variables to determine if that relationship is significant.

Collect the data

Survey 10 textbooks. Collect bivariate data (number of pages in a textbook, the cost of the
textbook).

Complete the table.

Number of pages

Cost of textbook

Which variable should be the dependent variable and which should be the independent
variable? Why?

Graph “distance” vs. “cost.” Plot the points on the graph in "Analyze the Data". Label both axes with
words. Scale both axes.

Analyze the data

Enter your data into your calculator or computer.
Write the linear equation below, rounding to 4 decimal places.

Calculate the following:

$a$ =

$b$ =

correlation =

$n$ =

equation:
$y$ =

Supply an answer for the following senarios:

For a textbook with 400 pages, predict the cost:

For a textbook with 600 pages, predict the cost:

Obtain the graph on your calculator or computer. Sketch the regression line below.

Discussion questions

Answer each with 1-3 complete sentences.

Does the line seem to fit the data?
Why?

What does the correlation imply about the relationship between the number of pages
and the cost?

Are there any outliers? If so, which point(s) is an outlier?

Should the outlier, if it exists, be removed? Why or why not?

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387

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

Azam

anybody can imagine what will be happen after 100 years from now in nano tech world

Prasenjit

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

Azam

name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world

Prasenjit

how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?

Damian

silver nanoparticles could handle the job?

Damian

not now but maybe in future only AgNP maybe any other nanomaterials

Azam

Hello

Uday

I'm interested in Nanotube

Uday

this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15

Prasenjit

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.

Source:
OpenStax, Collaborative statistics using spreadsheets. OpenStax CNX. Jan 05, 2016 Download for free at http://legacy.cnx.org/content/col11521/1.23

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