ANOVA – Xynamine
1- Given below are pulse rate for a placebo group the researcher selected all men in order to obtain more consistence results that do not have a confounding variable of gender, to test the effect of Xynamine – an new drug designed to lower pulse rate – one group was treated with drug Xynamine in 10 -mg doses, and a group of men treated with 20-mg. pulse rates are randomly distributed with a mean of 70 beats per minute and 11 beats per minutes is the standard deviation. The research summary states that the drug is effective based on this evidence: The placebo group has a mean pulse rate of 68.9 which is close to the value of 70 (the mean in general). But the group treated with 10-mg of the drug has lower mean of 66.2 and the group treated with 20-mg has the lowest of 65.2.
Placebo Group 10-mg Treatment group 20-mg treatment group
77 67 72
61 48 94
66 79 57
63 67 63
81 57 69
75 71 59
66 66 64
79 85 82
66 75 34
75 77 76
48 57 59
70 45 53
Analyze the results using one way ANOVA.
Does two way ANOVA work? Why or why not?
Does it appear that there is a sufficient evidence to support the claim that the drug is lowers pulse rate?
Are there any serious problems with the design of the experiment/ given that only males were involved with the experiments?
Do the results apply to females?
The researcher compared the post treatment pulse rate to the mean pulse rate for adults male, is there a better way to measure the drug’s effectiveness in lowering the pulse rate?
How would you characterize the overall validity results, should the drug be approved? Write a brief report summarizing your findings.