Extra Bits (1)

Question 1

Pie charts level of data

Answer 1

Nominal level data

Question 2

Line graphs type of data

Answer 2

Change over time

Question 3

Histogram type of data

Answer 3

Continuous data

Question 4

Bar chart type of data

Answer 4

Discrete data

Question 5

5 Inferential statistics tests

Answer 5

Mann-Whitney U test
Willcoxon Signed Ranked test
Chi Square
Binomial Sign test
Spearman’s Rho

Question 6

Independent x nominal

Answer 6

Chi-square

Question 7

Independent x ordinal

Answer 7

Mann Whitney U

Question 8

Repeated/matched x nominal

Answer 8

Binomial

Question 9

Repeated/matched x ordinal

Answer 9

Wilcoxon signed ranked

Question 10

Correlation x nominal

Answer 10

N/a

Question 11

Correlation x ordinal

Answer 11

Spearman’s Rho

Question 12

3 criteria for parametric tests

Answer 12

Interval/ratio level data
Curve of normal distribution
Similar variances

Question 13

Standard level of significance

Answer 13

1 in 20

0.05

Question 14

P> 0.05

Answer 14

Null hypothesis supported

Results down to chance

Question 15

P

Answer 15

Alternative hypothesis supported

Results down to change in IV

Question 16

P

Answer 16

Alternative hypothesis strongly supported

Probability of results being down to chance are less than/equal to 1 in 100

Question 17

Type 1 errors

Answer 17

False positive

Alternative hypothesis mistakenly accepted

Question 18

Type 2 errors

Answer 18

False negative

Alternative hypothesis mistakenly rejected

Question 19

Positively skewed

Answer 19

Downhill

Question 20

Negatively skewed

Answer 20

Uphill

Question 21

OC

Answer 21

Is proportional to

Question 22

~

Answer 22

Approximately

Question 23

chi square calculated value

Answer 23

fo - fe
square it
divide by fe

Question 24

chi square fo

Answer 24

fo = observed frequency (what the frequency was)

Question 25

chi square expected frequency

Answer 25

fe = expected frequency (R x C / T)

Question 26

chi square degrees of freedom

Answer 26

total no. of rows - 1 x total no.of columns -1