66 Outcome 2 Male mean=￡45( Stand dev=￡10) 冷 Female mean=￡55( Stand dev=￡10) . The widths of the boxes would lead to the decision from the l D. A that there is definitely a link MALE PEALE AMOUNT 25
Outcome 2 ❖Male Mean = £45 (Stand Dev = £10) ❖Female Mean = £55 (Stand Dev = £10) ❖ The widths of the boxes would lead to the decision from the I.D.A. that there is definitely a link
66 Outcome 3 ☆Ma| e Mean=￡45 ( Stand dev=￡40) ☆ Female mean=￡55 Stand dev=￡40) FDa is required and stand Dev is bigger MALE MALE AMOUNT 25 75
Outcome 3 ❖Male Mean = £45 (Stand Dev = £40) ❖Female Mean = £55 (Stand Dev = £40) ❖ FDA is required and Stand Dev is bigger
o6 Measure of Relative Separation of the boxplots Considering not only MEans but also STANDARD DEVIATIONof the two samples 令 Finding“ Threshold value wolf Measure of relative separation threshold value os there is a connection calf Measure of Relative Separation Threshold value esther is no connection
Measure of Relative Separation of the boxplots ❖Considering not only MEANS but also STANDARD DEVIATIONof the two samples ❖ Finding “Threshold value” If Measure of Relative Separation > Threshold value, there is a connection If Measure of Relative Separation < Threshold value there is no connection
oo Student's t Ratio(a measure of the relative separation of the boxplots . Sample data is Normal distribution ☆ Student's t-test ca/c value of t-ratio Sample averages Standard deviations Males Females males Females Males Females Example I455510010020 20353553 Example24555100100101070707 Example345551001004040-1.7677
Student's t Ratio (a measure of the relative separation of the boxplots ) ❖Sample data is Normal distribution ❖Student’s t-test ❖tcalc --- value of t-ratio 2 2 2 1 2 1 1 2 n s n s X X t calc + − =