Class Notes (920,458)
CA (542,240)
UTSG (45,859)
BIO (2,271)
BIO120H1 (1,175)
Lecture

Bio lab 13 Feb 12 2010

2 Pages
87 Views

Department
Biology
Course Code
BIO120H1
Professor
Ingrid L.Stefanovic

This preview shows half of the first page. Sign up to view the full 2 pages of the document.
Bio lab 13
Measurment error reflects the discrepancy between our repeated measurment and the ture value of
the object being measured.
Precision and accurancy:
Precision t is the repeatability of the measurement.
If a single measurement when repeated shows little little variation, it ahs high precision, if it shows great
variation, it has low precision
Accurancy t is the tendency for the measured value to be close to, or apporximate, the true accepted
value.
Significant figures~
Measurement contain three parts t unit, scale factor and significant figures
Scientific notation~
Rounding numbers:
Less than 5 unchange~
Larger than 5 roung up
5 t before is even t unchange odd t roung up
Organized data:
Qualitative: such as hair colour, sex or something something are easy to group
Quantitative t discrete and continuous
Use a table or a figure to presenting data
Dependent variable plot on y-axis, and independent variable plot on x-axis
Line of best fit: a line which travels through the space pccupied by most of the points
Interpolation: line of best fit allow us to predict the data that is not one of the plot points
Extropolation: extending the line beyond the existing data t provide the base for prediction
Bar graph t used for discrete data
Historgram t used for continuous data
Statistics of location: describe the position of a sample along a given dimension.
Most common statistics location t mean, median and mode t usually called the measures of central
tendency.
Mean: calculated by divide the sum of the data by the number of individuals involve in the experiment
Median: middle value t odd number t the middle; even number t divided the middle two by 2.
Mode: the most frequently appear data
Note: median will become a better estimate of central tendency than mean under the situation that
there are some extreme data which tend to bias the mean in their direction.
Statistics of dispersion t variabiliy, used to describe how broad the set of data could be, narrow or wide
t simplest form t the range
Most common ~ vatiance and standard deviation and standard error
Range: the difference between the largest data and the smallest
Variance: measyre of how much scatter there is around the mean
Standard deviation: the square root of variance t average size of the deviation from the mean, symbol -s
Standard error: measure how reliable the sample mean is as an approximation to the population mean.
^AlOv
^µv[-test and chi-square test:
t-distribution: a distribution of the differences between two samples which are taken from the same
population that we can obtain simply by chance.
Bell-shaped and symmetrical t-distribution
This test is used to compare the means of two samples and assesses whether or not they differ enough
to represent samples from different population.
www.notesolution.com

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
Bio lab 13 Measurment error reflects the discrepancy between our repeated measurment and the ture value of the object being measured. Precision and accurancy: Precision J is the repeatability of the measurement. If a single measurement when repeated shows little little variation, it ahs high precision, if it shows great variation, it has low precision Accurancy J is the tendency for the measured value to be close to, or apporximate, the true accepted value. Significant figures~ Measurement contain three parts J unit, scale factor and significant figures Scientific notation~ Rounding numbers: Less than 5 unchange~ Larger than 5 roung up 5 J before is even J unchange odd J roung up Organized data: Qualitative: such as hair colour, sex or something something are easy to group Quantitative J discrete and continuous Use a table or a figure to presenting data Dependent variable plot on y-axis, and independent variable plot on x-axis Line of best fit: a line which travels through the space pccupied by most of the points Interpolation: line of best fit allow us to predict the data that is not one of the plot points Extropolation: extending the line beyond the existing data J provide the base for prediction Bar graph J used for discrete data Historgram J used for continuous data Statistics of location: describe the position of a sample along a given dimension. Most common statistics location J mean, median and mode
More Less
Unlock Document


Only half of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit