stats

Question 1

what is the chi squared equation?

Answer 1

x squared= sum of (O-E) squared divided by E

Question 2

how do you find degrees of freedom for chi squared?

Answer 2

number of classes -1

Question 3

how do you know if your data sets have a significant difference using chi squared?

Answer 3

at the correct degree of freedom and 0.05 significant level, pick the value. If your worked out value is greater than the critical value than there is a significant difference between the data sets and the null is rejected

Question 4

what does chi-squared work out?

Answer 4

If there is a significant difference between the expected and observed result

Question 5

define valid

Answer 5

results that answer the original question- controlled all the variables

Question 6

define accurate

Answer 6

results very close to true answer

Question 7

define reliable

Answer 7

repeatable and reproducible- results will be the same

Question 8

define precise

Answer 8

results don’t vary much from the mean