BIO LAB PRACTICAL

Question 1

Hypothesis

Answer 1

A general explanation for a phenomenon

Question 2

Prediction

Answer 2

A statement that describes how the dependent variable will be affected by the treatments if the hypothesis is supported

Question 3

Mean (or average)

Answer 3

the sum of the individual data points divided by the sample size

Question 4

Standard deviation

Answer 4

a measure of the amount of variation in data values around the mean

Question 5

Null hypothesis

Answer 5

always states that there will be no effect of your treatment on your dependent variable

Question 6

Independent variable

Answer 6

refers to a condition within an experiment that is manipulated by the scientist

Question 7

dependent variable

Answer 7

refers to an event or outcome of an experiment that might be affected by the manipulation of the independent variable

Question 8

negative control

Answer 8

the control group is exposed to all of the experimental conditions except for the actual treatment

Question 9

positive control

Answer 9

is run as a parallel experiment and generally involves the use of an alternative treatment that the researcher knows will have an effect on the dependent variable

Question 10

p-value for a t-test

Answer 10

probablility that the difference in your treatment means is due to chance and not due to the effect of the treatments

Question 11

p-value threshold

Answer 11

p>0.05 means that the null hypothesis is accepted

p<0.05 null rejected, support for alternative hypothesis