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Agricultural Statistics And Economics Quiz 6 (20 MCQs)

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1. If random samples are selected from a population, what happens to the margin of error is the sample size is increased from 50 to 200?
2. Identify whether the information described is a parameter or statistic. 3. There are 250 genetically modified fruit-bearing plants in the agricultural farm. After two weeks of observation, it was found that 75 plant samples have an average fruit size of 7.5 inches in length.
3. A left-tailed test with n = 41 has a test statistic t = 2.72. Which is the correct p-value?
4. Find the t* value for a 99% confidence interval with a sample of 23 people.
5. Units of information, often numeric, recorded and used for the purpose of analysis.
6. Which of the following is an economic activity?
7. If I tell you that you scored at the 55th percentile on your last exam, you would know:
8. Michael is trying to gather data for his study. He goes to a fast food restaurant during the lunch hour and asks people who walk into the restaurant if they would be willing to fill out a questionnaire. Which of the following methods of sampling is Michael using?
9. Mr. Marino has compiled a list of 1, 348 students in his high school. He has selected a sample of 42 students by choosing every 14 th student on this list.Which type of sampling is he using?
10. Choose the correct sequence of steps followed in a statistical enquiry-
11. What is the degrees of freedom equal to?
12. Which of the following values below represents the critical value for a 98% confidence interval?
13. Data for children between the ages of 18 and 30 months show that there is an approximately linear relationship between height and age. The relationship can be represented by y = 63.81 + 0.39x, where y represents height in cm and x represents age in months.Joseph is 22.5 months old. What is his predicted height?
14. The z-score represents .....
15. Which of the following is the critical value for an 80% confidence interval?
16. How small is a small p-value? All year we have defined small as any probability that is less than .....
17. In a simple random sample of 100 cars of a certain popular model in 2010, it was found that 20 had a certain minor defect in the brakes. For an independent SRS of 400 cars of the same model in 2011, it was found that 50 had the same defect. Let p1 and p2 be the proportions of all cars of this model in 2010 and 2011, respectively, that have the defect. We wish to test if the proportion of cars with the defect has decreased from 2010 to 2011. Which of the following is closest to the P-value for this test?
18. Which is the term that means a line that comes closest to all of the points in a scatter plot?
19. In a simple random sample of 100 cars of a certain popular model in 2010, it was found that 20 had a certain minor defect in the brakes. For an independent SRS of 400 cars of the same model in 2011, it was found that 50 had the same defect. Let p1 and p2 be the proportions of all cars of this model in 2010 and 2011, respectively, that have the defect. We wish to test H0:p1-p2 = 0 against HA:p1-p2 > 0 . Which of the following is closest to the P-value for this test?
20. When you employ somebody giving them a wage then you are an-
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