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Agricultural Statistics And Economics Quiz 2 (30 MCQs)

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1. A person who plan and conduct an empirical investigation independently or with the help of others is called
2. Z-score is also called
3. About 76% of college professors said that if they could pick a career over again, they would choose to be a professor again. A random sample of 59 college professors in Colorado showed that 47 claim they would choose college teaching again. Does this indicate the proportion of professors in Colorado who would choose the career again is greater than the national rate of 76%? Use a 1% level of significance.
4. Which is not considered as an economic activity
5. Statistics is defined in terms of numerical data in the-
6. What type of sampling? Law enforcement officials use a radar gun to measure the speed of every 5th vehicle on an interstate.
7. It is the record of sticks that gives you the frequency or the number of values that fall into class interval.
8. Gabriella's quiz grades are shown below. 88, 92, 92, 96, 98 Gabriella scored a 20 on her sixth quiz. What effect does this score have?
9. If 10 is added to every value in a set of data, what will happen to the value of the standard deviation?
10. What is the Rate of Self-Sufficiency 2021 for Rice?
11. Statistics is applied in-
12. The 90% interval for a statistics test was given by 72 +-7. What is the lower value for the interval?
13. An agricultural company wanted to know if a new insecticide would increase corn yields. Eight test plots showed an average increase of 3.125 bushels per acre. The standard deviation of the increases was 2.911 bushels per acre. Determine a 99% confidence interval for the mean increase in yield.
14. Identify whether the information described is a parameter or statistic. In a recent year, the interest category for 12% of all new magazines was sports.
15. A business evaluates a proposed venture as follows. It stands to make a profit of $ 10, 000 with probability 3/20, to make a profit of $ 5000 with probability 9/20, to break even with probability 5/20, and to lose $ 5000 with probability 3/20. The expected profit in dollars is
16. Scatterplots require that both variables be quantitative.
17. The correlation coefficient measures
18. Slab avalanches studied in Canada have an average thickness of $\mu$ = 67 cm. The ski patrol at Vail Colorado, is studying slab avalanches in their region. A random sample of 16 avalanches showed that x-bar = 61.8cm and s = 10.6 cm. Assuming the slab thickness is normally distributed, test the claim that the mean slab thickness is the Vail region is different from that in Canada with a level of significance of 1%.
19. Using the information below, identify which of the following is NOT an outlier:Q1 = 53Q2 = 55Q3=61
20. Correlation and regression requires an explanatory and response variable.
21. Part of the survey that gives the respondent the SURVEY TOPIC (or what the survey is all about) and what to do with the survey.
22. At right is a cumulative relative frequency graph for the 48 racers who finished the grueling 50km cross-country ski race at the 2014 Sochi Olympics. Approximately what proportion of the racers finished the race in MORE than 2.15 hours?
23. If a number is added to a set that is far away from the mean, how does this affect standard deviation?
24. In a survey of 2480 golfers, 15% said they were left-handed. The survey's margin of error was 3%. Construct a confidence interval for the proportion of left-handed golfers.
25. Which is NOT an example of categorical data?
26. For the set of data below, which statement is correct.55, 60, 76, 88, 92, 111, 120
27. Which is the strongest correlation?
28. Complete the equation:point estimate +/ .....
29. Select three students from a class to receive ice cream by putting all the students' names in a hat and picking out three names randomly.
30. If a distribution is skewed to the right, which of the following is true?
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