The National Center for Education Statistics reports that the proportion of college freshmen who return to the same school for their sophomore year is 0.7. Suppose we select a random sample of 480 freshmen from across the nation. Question 1. What is the expected value of the sampling distribution model for the proportion of 480 freshmen that will return to the same school for their sophomore year?

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

thats not a system of equations, that is a solution

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step-by-step explanation: