Answer: 0.750
Step-by-step explanation:
Let p be the population proportion .
We are given that a sample of 400 voters reveals that 300 would support her in the November election.
Then the sample proportion for this situation will be :-
[tex]\hat{p}=\dfrac{300}{400}=0.750[/tex]
Since the sample proportion is the best point estimate for the population proportion.
Therefore, the estimated value of the population proportion =0.750