Biometry Chapters 1 & 2
What are the 3 goals of biometry?
1. To do science
2. To evaluate other's work
3. To communicate
What are the 7 steps to the scientific method?
7. Disseminate Results
An educated guess at an answer to a question about cause, mechanism, or function.
Alternative research hypothesis?
A different educated guess to the same question of your original hypothesis.
What you would expect to find if a particular hypothesis is true
A prediction expressed in broad general terms
A prediction expressed in term of things you can measure
How do you write a prediction?
If - then statement
A variable whose variation does not depend on another variable
A variable whose variation dependent on the variation of the independent variable. It is what is measured in the end of the experiment.
Synonyms for independent variable (3)
Synonyms for dependent variable (3)
A group of every individual in the world
Average __________ of a population.
A group representing the population
A value that estimates the parameter
Three characteristics of a good sample
1. Large sample size (n>20)
2. Avoid bias
3. Independent measurements
A sample should have the __________ __________ as the population it is representing.
A sample should have the same characteristics as the population it is representing.
How to tell how large of a sample size you need.
Three types of measurements
Categories that have no intrinsic order
- Male or female
- Blue or pink flowers
Categories with order or ranking.
- Low, medium or high parasitic burden
- Freshmen, sophomores, juniors, or seniors
Expressed by numbers or amount.
- Temperature, height, age, mass
Two types of scale/quantitative measurements.
Scale data generated by counting
- Counting the number of parasitic worms
Scale data generated by measuring
- Measuring the length of parasitic worms