Reliability coefficient of a test using split half method is:
1
\(\frac{\left( 2r_{\frac{1}{2}} \right)}{\left(2+r_{\frac{1}{2}}\right)}\)
2
\(\frac{\left( r_{\frac{1}{2}} \right)}{\left(2+r_{\frac{1}{2}}\right)}\)
3
\(\frac{\left( 2r_{\frac{1}{2}} \right)}{\left(1+r_{\frac{1}{2}}\right)}\)
4
\(\frac{\left( r_{\frac{1}{2}} \right)}{\left(1+r_{\frac{1}{2}}\right)}\)