#1. A drug company asserts that its course of treatment, will, on average, reduce a person's cholestrol level by 0.8 mmol/L. A researcher undertakes a trial with a sample of 30 individuals. What should he report if he obtains the following results:
(a) A mean increase of 0.6 units, with standard error 0.2 units;
(b) A mean decrease of 0.4 units, with standard error 0.2 units;
(c) A mean increase of 0.4 units, with standard error 0.2 units?
*Note there are two null hypotheses to consider here: a) The drug company's claim is true. b) The drug has no effect. *
#2. In the previous question, a researcher was evaluating the assertion of a drug company that its course of treatment will, on average, reduce a person's cholestrol level by 0.8 mmol/L. Explain whether he might have been justified in performing one-sided tests in cases (a) - (c), and determine whether his conclusions would have been different.
#1. A drug company asserts that its course of treatment, will, on average, reduce a person's cholestrol level by 0.8 mmol/L. A researcher undertakes a trial with a sample of 30 individuals. What should he report if he obtains the following results:
(a) A mean increase of 0.6 units, with standard error 0.2 units;
(b) A mean decrease of 0.4 units, with standard error 0.2 units;
(c) A mean increase of 0.4 units, with standard error 0.2 units?
*Note there are two null hypotheses to consider here: a) The drug company's claim is true. b) The drug has no effect. *
#2. In the previous question, a researcher was evaluating the assertion of a drug company that its course of treatment will, on average, reduce a person's cholestrol level by 0.8 mmol/L. Explain whether he might have been justified in performing one-sided tests in cases (a) - (c), and determine whether his conclusions would have been different.
