Statistical tests: For each scenario below, identify the type of test you should use for the...

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Biology

Statistical tests: For each scenario below, identify thetype of test you should use for the analysis.
79. Analyzing the effects of a drug on blood pressure level in astudy with 20 people. All 20 people are tested both before takingthe drug and after taking the drug.
a) paired t-test
b) unpaired t-test
c) c² test (chi-squared test)
80. Analyzing the effects of a drug on blood pressure level in astudy with 30 people. 15 people take the drug and the other 15people take the placebo.
a) paired t-test
b) unpaired t-test
c) c² test (chi-squared test)
81. Analyzing the effects on pollution on plant size in 10different regions in the US. In each region, 20 plants exposed topollution are measured and 20 plants not exposed to pollution aremeasured.
a) paired t-test
b) unpaired t-test
c) c² test (chi-squared test)

Answer & Explanation Solved by verified expert

3.9 Ratings (694 Votes)

The answer of the question no 79 is The scenario that is mentioned in this question can be analysed by using paired ttest Because in case of two groups that are related ie when two groups are actually same With the help of paired ttest we mainly try to find out if any significant difference in the averages of these groups is present or not In the paired ttest same population is evaluated before and after a particular incidence Such as before and after treating See Answer

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