Homework SourseStatistics Questions Statistical Tests which of the followin
Statistics Questions!! Statistical Tests!!
which of the following statistical tests correspond to the following two data tables.
paired t test, unpaired t test, regression, correlation, or chi squared
1.Number of earthworms observed above ground each night as a function of the relative humidity of air
2.Rates of bacterial respiration (mg CO2/kg soil/h) in sandy vs. clay soils
| Night | Relative humidity (%) | Number of worms per 100 m |
| 1 | 45 | 2 |
| 2 | 85 | 11 |
| 3 | 80 | 8 |
| 4 | 55 | 4 |
| 5 | 50 | 4 |
| 6 | 70 | 6 |
| 7 | 60 | 8 |
| 8 | 75 | 14 |
| 9 | 70 | 10 |
| 10 | 40 | 0 |
| 11 | 65 | 3 |
Solution
(1) Answer: correlation
paired t test: It is not a sample of matched pairs.
unpaired t test: It is not two independent groups because it tests the same subject.
regression : It is estimating the relationships among variables.
chi squared: It is any statistical hypothesis test in which the sampling distribution of the test statistic is a chi-square distribution when the null hypothesis is true.
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(2) Answer: regression (because it has more than 2 variables)
paired t test: It is not a sample of matched pairs.
unpaired t test: It is not two independent groups because it tests the same subject.
chi squared: It is any statistical hypothesis test in which the sampling distribution of the test statistic is a chi-square distribution when the null hypothesis is true.
