investigation

Question 1

null hypothesis

Answer 1

when you say there is no there is no relationship

Question 2

an example of a null hypothesis

Answer 2

The ph of the soil does not affect the rate of hypothesis

Question 3

dependent variable

Answer 3

what you measure in the experiment and what is affected during the experiment

Question 4

example of a dependent variable

Answer 4

a test score as it could change depending on how much someone studied or how tired they was, current through lamp

Question 5

independent variable

Answer 5

a variable that aint changed by other variables

Question 6

controlled variable

Answer 6

an variable that cannot be changed during the experiment

Question 7

example of a independent variable

Answer 7

someones age as it other factors cant change it, voltage of power supply

Question 8

example of a controlled variable

Answer 8

amount of light during a experiment.

Question 9

what is the chi squared test

Answer 9

to test if there is no significant difference between the observed and expected values of two numbers