inferential statistics

Question 1

normal distribution

Answer 1

most of the participants scores fall around the midpoint, fewer participants scores are at the high and low ends

Question 2

negatively skewed distribution

Answer 2

where some participants scores are much lower than the rest of the data. the line starts on the left side and goes up to the right

Question 3

positively skewed distribution

Answer 3

only few students have a higher score than the res. the line starts on the right side and goes up on the left

Question 4

level of significance NOT being reached

Answer 4

psychologists would say p>0.05 meaning probability is due to chance factors where there is a chance greater than 1 in 20

Question 5

what hypothesis is supported for level of significance being p>0.05

Answer 5

null hypothesis

Question 6

level of significance being reached

Answer 6

psychologists would write p< or equal to 0.05 meaning the probability is less than or equal to a 1 in 20 chance

Question 7

what hypothesis is supported for level of significance being p<0.05

Answer 7

alternative hypothesis

Question 8

level of significance EXCEEDED

Answer 8

psychologists would write the highest level of significance, which could be p<0.01 where there’s a 1 in 100 chance

Question 9

what hypothesis is supported if level of significance is p<0.01 (for example)

Answer 9

alternative hypothesis is strongly supported

Question 10

criteria for parametric tests

Answer 10

-interval level data
-normal distribution
-all groups have similar variance

Question 11

type 1 error

Answer 11

a false POSITIVE- psychologists think they found something significant where they HAVE NOT

Question 12

type 2 error

Answer 12

a false NEGATIVE- psychologists think they have found something insignificant when they HAVE