Information and IdeasVery hardReading a table of crop yields under two methods
Information and Ideas practice question
Yield per hectare on trial plots (tonnes)
Method | Plots | Mean yield | Lowest plot | Highest plot
Standard | 20 | 6.1 | 5.6 | 6.5
New | 20 | 6.4 | 3.9 | 8.8
An agronomist notes that although the new method has the higher mean yield, ____
Which choice most effectively uses data from the table to complete the statement?
- A. its results ranged from 3.9 to 8.8 tonnes, far more variable than the standard method's 5.6 to 6.5, so a farmer using it risks a much worse year.Correct
- B. the standard method's mean yield was 6.1 tonnes.
- C. both methods were tested on 20 plots.
- D. the new method's best plot yielded 8.8 tonnes.
Answer: A. its results ranged from 3.9 to 8.8 tonnes, far more variable than the standard method's 5.6 to 6.5, so a farmer using it risks a much worse year.
Higher mean, much wider spread.
Why the other answers are wrong
- B. the standard method's mean yield was 6.1 tonnes.
- The standard mean, no contrast about risk.
- C. both methods were tested on 20 plots.
- Equal plots, no point.
- D. the new method's best plot yielded 8.8 tonnes.
- The best plot alone flatters the new method.
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