Lecture week 10- CI

Question 1

In research what is there always

Question 2

we use samples to give….

Question 3

we use the sample means as an estimate….

Question 4

what is the confidence interval

Question 5

what does confidence interval look on a graph

Question 6

can CI be calculated on any level

Question 7

what is the most usual level for calculating CI

Question 8

if the CI is 95% what does this mean

Question 9

what is the equation for 95% CI

Question 10

the higher the CI….

Question 11

if the CI is 50, 90, 95% what statement is stated after

Answer 11

of containing the true population mean/parameter

Question 12

what is the equation for the t-value

Question 13

where do u find the t-value

Question 14

what does the t-value depend on

Question 15

how is SE calculated

Question 16

how is df calculated

Question 17

is the CI lower limit TO upper limit

Question 18

What are the steps for calculating confidence level

Question 19

what does a wide CI indicate

Answer 19

lack of certainty

Question 20

what does a narrow CI Indicate

Answer 20

more precise

Question 21

if the complete absence of any effect corresponds to a difference of 0 or a 1 ratio what does this mean

Question 22

what does it mean if the 95% CI around the observed effect size includes the no-effect value (0 for differences, 1 for ratios)

Question 23

what does it mean if the 95% CI around the observed effect size does not include the no-effect value (0 for differences, 1 for ratios)

Question 24

what affects the CI

Question 25

how does CI affect sample size

Question 26

what does H0 mean

Question 27

what does H1 mean

Question 28

when does a type 1 error occur

Question 29

when does a type 2 error occur

Question 30

explain the truth table

Question 31

what are p values and does a p<0.005 indicate significance

Question 32

what is power

Question 33

what is the equation for power

Question 34

what increases power

Question 35

when does power power calculations be carried out

Question 36

as power increases what 2 things decrease

Question 37

what is Statistical Power affected by

Question 38

what does Statistical significance not always imply