Stats

Question 1

What is a Null hypothesis

Answer 1

There is no statistically significant impact or difference (h0)

0 is little

Question 2

What is the purpose of statistical tests?

Answer 2

To determined if you can accept or reject an null hypothesis

Question 3

What is the alpha and what does it need to be

Answer 3

Alpha - confidence that the difference is not due to random chance

95%

Question 4

What do the P values need to be to reject or accept a null hypothesis

Answer 4

P value more than 0.05 - reject the hypothesis

p value less than 0.05 - accept the hypothesis

Question 5

What do the
S
X
X- (with the line above)
N
mean in the standard deviation equation

Answer 5

S - standard deviation
X - difference
X (with line above) - Mean of difference
N - Sample size

Question 6

What do the
T
Sd
D (with a line above)
N
mean in the paired T - test

Answer 6

T - t-value
Sd - standard deviation
D (with a line above) - Mean of difference
N - sample size

Question 7

How do you tell if the null hypothesis is significant

Answer 7

T-value larger the P- value = significant