A company is criticized because only 20 of 49 executives at a local branch are women. The company explains that although this proportion is lower...

A company is criticized because only 20 of 49 executives at a local branch are women. The company explains that although this proportion is lower than it might wish, it's not a surprising value given that only 45% of all its employees are women. The company has more than 500  executives worldwide. Test an appropriate hypothesis and state the conclusion.

Determine the hypotheses for this test. (The proportion of female executives in the entire company is denoted by p.) 

What is the test statistic and the Pvalue