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Agricultural Statistics And Economics Quiz 8 (29 MCQs)

Quiz Instructions

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1. The 75th percentile is also know as the
2. A radio talk show host is interested in the proportion p of adults in his listening area who think that the drinking age should be lowered to 18. To find this proportion, he poses the following question to his listeners: "Do you think that the drinking age should be reduced to 18? " He asks listeners to phone in and vote "yes" or "no" depending upon their opinions. Of 200 people who phone in, 140 answer "yes." The standard error of the sample proportion of "yes" votes among those who phone in is
3. In order to test the effect of music on productivity, a group of assembly line workers are given music players to play whatever music they choose while working for one month. For another month, they work without music. The order of the two treatments for each worker is determined randomly. This is .....
4. ..... are those which are already in existence and which might be collected for some purpose other than the answering of the question in hand.
5. Find the critical value tc necessary to form a 95% confidence interval with a sample size of 15.
6. What happens to your confidence as your interval gets smaller?
7. If p-value < $ \alpha$, we ..... the null and have convincing evidence that the alternative is true, and the results are .....
8. Small p-values mean that our sample was very unlikely if the null hypothesis is true. Therefore, small p-values are ..... that the null hypothesis is wrong.
9. ..... is a statistical method used to determine whether a relationship between variables exists.
10. A radar unit is used to measure speeds of cars on a motorway. The speeds are normally distributed with a mean of 90 km/hr and a standard deviation of 10 km/hr. What is the probability that a car picked at random is travelling at more than 100 km/hr?
11. The Process of converting raw material into goods is called
12. What is the P-value if I have a test statistic of t = 1.632, sample size of 35, and I am doing a two-sided test?
13. Which subject area it belongs? How can you save money from your weekly allowance?
14. If the line of best fit is y =-x + 8, what is the predicted y if x = 12?
15. The standard error of estimate is the square root of the unexplained variation.
16. Some questions be asked from respondents on trial basis, if their answers involve some difficulty these can be reframed accordingly .Such testing is called
17. The distances male long jumpers for State College jump are approximately normal with a mean of 263 inches and a standard deviation of 14 inches. Suppose a male long jumper's jump ranked in the 75th percentile. How long was his jump?
18. An Air Force vase mess hall has received a shipment of 10, 000 gallon size cams of cherries. The supplier claims that the average amount of liquid is 0.25 gallons per can. A government inspector took a random sample of 100 cans and found that the average liquid content to be 0.28 gallons per can with a standard deviation of 0.10. Does this indicate that the supplier's claim is too low? (Use a 5% level of significance)
19. Which of the following are true statements? I. Correlation requires that there are clearly-identified explanatory and response variables.II. Scatterplots require that both variables be quantitative.III. Every least-squares regression line passes through (x ....., y ..... ).
20. How sample method is differ from census method on the basis of cost?
21. It is a systematic way to arrange data in rows or horizontal and column or vertical for easy referencing
22. Division of the national income into wages, profits rents, and interest is called as-
23. The factors of production are-
24. ..... is the root of all economic problems
25. Suppose that the Department of Agriculture wishes to investigate the use of pesticides by farmers in California. A sample could be taken by identifying the different counties in California, and a random sample of these counties then be chosen. This would be a
26. Is a characteristics that is being studied is called .....
27. Construct a 98% confidence interval for the population mean, $\mu$. Assume the population has a normal distribution. A study of 14 car owners showed that their average repair bill was $ 192 with a standard deviation of $ 8.
28. A researcher studying reaction time of drivers states that, "A 95% confidence interval for the mean time it takes for a driver to apply the brakes after seeing the brake lights on a vehicle in front of him is 1.2 to 1.8 seconds. What are the point estimate and margin of error for this interval?
29. Each student at a school has a student identification number. Counselors have a computer generate 50 random identification numbers, and the students associated with those numbers are asked to take a survey.What type of sample is this?
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