Reference no: EM13111647
Does lovastatin reduce the risk of heart attack? Researchers gave lovastatin to 2,325 people and an placebo to 2,081 people. the average age of both groups in 58 years.
After 5 years, 57 of the lavastatin group had suffered a heart attack, compared to 97 from the placebo group. At a=.01, can we conclude that the lovastatin users had a lower incidence of heart attack?
The hypothiese in this problem can be setup for either a left or right tail test, depending on which population you place on the left and right.
Zc=2.326 or -2.325
Z=3.987
normality justified
State the null and alternative hypothesis.
Select a level of significance.
Identify the test statistic.
Formulate a decision rule.
Make a decision.
Is normality assured? Why or why not?
What else would the researcher need to know before prescribing this drug widely?
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Why the eeg may be influenced by hyperventilation
: Which type of neural activity, action potentials, or synaptic potentials, produces the EEG? Explain your answer. Speculate as to why the EEG may be influenced by hyperventilation.
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Calculate the mass of calcium carbonate
: The pH in a lake the size of 4.0 km X 7.0 km and an average depth of 100 m is found to be 4.5. Calculate the mass of calcium carbonate that must be added to the lake water in order to raise its pH to 6.0.
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Information about f distribution
: What do we use the F Distribution to test? Provide an example from your place of employment or circle of influence of an instance when you could use the F Distribution.
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What is the order of the three markers
: Using bacteriophage P22, you performed a three-factor cross in Salmonella typhimurium. The cross was between an Arg-Leu-His- recipient bacterium and bacteriophage P22, which was grown on an Arg+ Leu+ His+ strain. You selected for 1000 Arg+ transdu..
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Hypothesis esting of heart attack
: Does lovastatin reduce the risk of heart attack? Researchers gave lovastatin to 2,325 people and an placebo to 2,081 people. the average age of both groups in 58 years.
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Computing kwh of a wind turbine
: Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 60 meters and a wind-conversion efficiency of 25 percent. The turbine operates in an area with an average wind-power density of 700 watts/sq meter at 50 meters altitude.
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Describe gene duplication, homeobox genes
: Describe gene duplication, homeobox genes, and retention of juvenile characters in the process of macroevolution. (Please be specific)
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Question on one tailed hypothesis test
: To test the hypothesis that students who finish an exam first get better grades, a professor kept track of the order in which paper were handed in.
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Determine the predicted concentration of hcb
: For HCB, log Kow = 6.6. What would be the predicted concentration (ppm) of HCB due to bio-concentration in the fat of fish that swim in waters containing 0.000010 ppm of the chemical?
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