Statistics

Question 1

what is nominal data

Answer 1

categorical data e.g. hair colour

Question 2

what is ordinal data

Answer 2

data that has an order/rank/position (unequal positions) e.g. places in a race

Question 3

what is interval data

Answer 3

data that has equal intervals between the data e.g. temperature, weight

Question 4

what is parametric data

Answer 4

we can assume that the data will fall on the normal distribution curve

Question 5

what is the measure of central tendency and dispersion for nominal data

Answer 5

mode, n/a

Question 6

what is the measure of central tendency and dispersion for ordinal data

Answer 6

median, range

Question 7

what is the measure of central tendency and dispersion

Answer 7

mean, standard deviation

Question 8

when would you use a Chi squared test

Answer 8

• test of difference OR association
• unrelated design (independent groups)
• nominal data
• (rows - 1) x (columns - 1) degrees of freedom
• X^2 must be more than the critical value for the data to be significant

Question 9

when would you use the sign test

Answer 9

• test of difference
• related (repeated measures)
• nominal
• the degrees of freedom is the number of participants minus any participants who generate the same difference
• to be significant the S value needs to be equal to or less than the critical value

Question 10

what is the Mann Whitney test

Answer 10

• test of difference
• unrelated design (independent groups)
• ordinal data
• degrees of freedom is the total number of participants in both conditions
• U must be less than the critical value for the data to be significant

Question 11

what is the Wilcoxon test

Answer 11

• test of difference
• related design (repeated measures)
• ordinal data
• degrees of freedom is number of participants minus any joint ranked scores
• T must be less than the critical value for the data to be significant

Question 12

what is the Spearman’s Rho

Answer 12

• test of correlation
• ordinal data
• degrees of freedom is the total number of pairs for the correlation
• rho must be more than the critical value for the data to be significant

Question 13

what is the unrelated T test

Answer 13

• test of difference
• unrelated design (independent groups)
• interval data (parametric)
• degrees of freedom is the total number of participants in both conditions minus 2
• t must be more than the critical value for the data to be significant

Question 14

what is the related T test

Answer 14

• test of difference
• releated design (repeated measures)
• interval data (parametric)
• degrees of freedom is total number of participants minus 1
• t must be more than the critical value for the data to be significant