A survey of 320 families with 5 children shows the following distribution:
No. of boys & girls
5 boys & 0 girls
4 boys & 1 girls
3 boys & 2 girls
2 boys & 3 girls
1 boys & 4 girls
0 boys & 5 girls
Total
No. of families
18
56
110
88
40
8
320
Given that the value of 2 for degree of freedom 5 are 11.1 and 15.1 at at 5% and 1% level of significance respectively, test the hypothesis that male and female births are equally probable.
