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Agricultural Statistics And Economics Quiz 11 (20 MCQs)

Quiz Instructions

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1. Which one of the following statements is true about Student's t distribution?
2. What is the format for interpreting a confidence interval?
3. To test a claim about a mean, when the population standard deviation is unknown we use:
4. A 90% confidence interval for a population mean is determined to be 800 to 900. If the confidence is increased to 95% confidence while the sample statistics and sample size remain the same, the confidence interval
5. Construct a 95% confidence interval for the population mean mu. Assume the population has a normal distribution. A sample of 20 college students had mean annual earnings of $ 3120 with a standard deviation of $ 677.
6. Ms. Washington is investigating teachers' attitudes toward year-round schooling. She is particularly interested in describing the attitudes of teachersfrom small, medium, and large schools. Which sampling procedure should be used by Ms. Washington to ensure her sample is representative of these types of schools?
7. Which District has the highest total of rice crop entrepreneurs in 2021?
8. It represents differences in quality, character, or kind but not in amount.
9. Whatever probability we choose as the cutoff for what is small is what we call the .....
10. This part of survey is the list of question items which can be open-ended questions
11. The amount added and subtracted to the statistic.
12. A ..... gives an interval of plausible values for the .....
13. A sample of 40 people owned an average of 1.35 apple products. It is known from a previous study that the population standard deviation of apple product ownership is 0.63 products. Construct a 95% confidence interval.
14. A researcher finds that the correlation between the personality traits "greed" and "superciliousness" is-0.40. What percentage of the variation in greed can be explained by the relationship with superciliousness?
15. What is the t value associated with 90% confidence and a sample size of 15?
16. The 75th percentile is also know as the
17. 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
18. 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 .....
19. ..... are those which are already in existence and which might be collected for some purpose other than the answering of the question in hand.
20. Find the critical value tc necessary to form a 95% confidence interval with a sample size of 15.
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