15.46 A researcher randomly collected the annually income

(in thousand) in a village for three different age range (less than 20 years old, 20 to 30 years old and above 30 years old) based on gender (male and female). She recorded her findings in the following table.

Test Type Subject Type Male Female 6 20 54 49 59 39 55 25 29 47 26 28 20–30 53 72 43 56 52 46 51 33 47 41

>30 33 30 26 25 29 18 21 34 40 24

a. Set up the analysis of variance table for the data collected by the researcher.

b. Test the null hypothesis of the effects are significant at 5% significance level.