The regression analysis below relates average annual per capita beef consumption (in pounds) and the independent variable “average annual beef price” (in dollars per pound).
The coefficient on beef price tells us that:
A. For every price increase of $1, average beef consumption decreases by 9.31 pounds.
B. For every price increase of $1, average beef consumption increases by 9.31 pounds.
C. For every price increase $9.31, average beef consumption decreases by 1 pound.
D. For price increase of $9.31, average beef consumption increases by 1 pound.
2. Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second factory, 350 chips are sampled. The proportions of defective chips are 4.0% and 6.0%, respectively.
Using a confidence level of 95%, which of the following statements is supported by the data?
A. There is not sufficient evidence to show a significant difference in the average defect rates of the two factories.
B. There is a significant difference in the average defect rates of the two factories.
C. The first factory’s average defect rate is lower than the second factory’s on 95 out of 100 days of operation.
D. None of the above
3. Preliminary estimates suggest that about 58% of students at a state university favor implementing an honor code.
To obtain a 95% confidence interval for the proportion of all students at the university favoring the honor code, what is the minimum sample size needed if the total width of the confidence interval must be less than 5 percentage points (i.e., the confidence interval should extend at most 2.5 percentage points above and below the sample proportion)?
A. 375
B. 264
C. 1,498
D. The answer cannot be determined from the information given.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more