inferential statistics

Question 1

normal distribution curves

Answer 1

a distribution that has most of the data in the centre with decreasing amounts evenly distributed to the left and the right.

Question 2

skewed distribution curves

Answer 2

Skewed Distribution is distribution with data clumped up on one side or the other with decreasing amounts trailing off to the left or the right

Question 3

what are the 5 non-parametric inferential tests

Answer 3

Mann-whitney U test, Wilcoxon Signed ranks test, Chi-squared test, Binominal Sign test and Spearman’s Rho test

Question 4

type 1 error

Answer 4

is deciding to reject the null hypothesis, concluding that the IV did have a significant effect on

Question 5

type 2 error

Answer 5

is deciding to retain the null hypothesis, concluding that the IV had no significant effect on the DV when actually the result was caused by the IV