Im not sure what you mean by that? be specific please and i will be sure to help ;)
The complete question is as follows:
The admission directory of Big City University has a novel idea. He proposed using the IQ scores of current students as a marketing tool. The university agrees to provide him with enough money to administer IQ tests to 50 students. So the director gives the IQ test to an SRS of 50 of the university’s 5000 freshman. The mean IQ score for the sample is xbar=112. The IQ test he administered is known to have a σ of 15. What is the 95% Confidence Interval about the mean? What can the director say about the mean score of the population of all 5000 freshman?
Answer: The 95% confidence interval about the mean is
.
The director can say that he is 95% confident that the mean IQ score of the 5000 freshmen lies between 107.84 and 116.16.
We follow these steps to arrive at the answer:
Since the population standard deviation of the IQ test is known, we can use the Z scores to find the confidence interval.
The formula for the confidence interval about the mean is:

In the equation above, X bar is known as the point estimate and the second term is known as Margin of Error.
The Critical Value of Z at the 95% confidence level is 1.96.
Substituting the values in the question in the equation above we have,



Answer:
b. consumer spending
Explanation:
GDP = C+I+G+(X-M)
The most powerful driver of an economy is consumption (C). In the US the biggest share in the GDP participation is the consumers expenditure of goods and services within the economy.
It is the medium of exchange. It serves as the mediator instrument used to encourage the deal, buy or exchange of products between parties. For an instrument to work as a medium of trade, it must speak to a standard of significant worth acknowledged by all gatherings. In present-day economies, the medium of trade is money.