If random samples of size 525 were taken from a very large population whose population proportion is 0.3. the standard deviation of the sample proportions (i. e., the standard error of the proportion) is

0.02

Step-by-step explanation:

Given: Sample size :

The population proportion

Then,

The formula to calculate the standard error is given by :-

Hence, the standard deviation of the sample proportions (i.e., the standard error of the proportion) is 0.02.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.