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(1) A clinical lab wants to evaluate the resistance power of its new medicine. It has provided the new medicine to a random sample of 300rats and retained the old drug for the remaining (200 rats). Three months after the dosage of the new drug, the group with the new medicinehas a resistance of 40.2 with a s.d of 6.5 while the group with the old drug had an average of35 with a s.d of 4.5.
NOTE: Follow all the steps in hypothesis testing. You can use Graphpad for this one.
(a) What is your Null and Alternate Hypothesis.
(b) Did the new medicine result in significantly higher resistance of the dogs? State the value of the test-statistic, the p-value and the 95% confidence interval.
(c)What do you mean by saying that this is the confidence interval in this case?
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The article can be on Descriptive Statistics, Probability and the Normal Distribution, Sampling and Sampling Distributions, Regression Analysis, or Time Series Forecasting.
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A microbiologist is testing a water sample for E-coli. Suppose the null hypothesis, H0, is: the sample contains E-coli.
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