Statistics on heart disease

Reference no: EM13112308

Heart disease patients often experience spasms of the coronary arteries. Because biological amines such as serotonin may play a role in these spasms, a research team measured serotonin levels post-mortem from patients who died of heart disease and from a control group that died of other causes. The data are summarized in the following table:

Serotonin level
Heart disease controls
Mean 3.840 5.310
Standard error 850 640
Number 8 12

1 Do patients dying of heart disease have serotonin levels significantly different from patients dying of other causes? Justify your answer statistically at the 5% significance level. (Which test did you use? Are you justified in assuming that the variances of the two populations are equal?)

2 Given the data, if you were told the serotonin level in the coronary arteries of a cadaver, could you make a fairly confident prediction of whether heart disease was involved? Explain.

Reference no: EM13112308

Questions Cloud

Why number of neutron increase after the element iron : Up to Iron "Fe", the number of proton and neutron are about equal, after Fe the number of neutron began to rapidly increase, with respect to the number of proton, why?

Describe the pathways of antigen processing : You have inhaled a spore from the common fungus Aspergillus fumigatus. Describe the pathways of antigen processing and presentation that would take place. Make sure to explain the detailed pathway.

Compute probability that player misses first throw : Given that he makes first, assume probability that he makes second is 0.60. Given that he misses first, assume probability that he makes second one is 0.40.

What are the genotypes of her mother, father : Consider an individual who has type O blood. Her brother has type AB. Her father's sister has type AB blood, and her father's father had a BB genotype. Her mother's sister has type O blood, and her mother's brother has type B blood. What are the g..

Statistics on heart disease : Heart disease patients often experience spasms of the coronary arteries. Because biological amines such as serotonin may play a role in these spasms, a research team measured serotonin levels post-mortem from patients who died of heart disease and..

Estimate total volume of hcl : A solution containing 10.mmol of CO3^-2 and 5.0 mmol. Of HCO3- is titrated with 1.0M HCL What total volume of HCL must be added to reach the second equivalence point?

What phenotypes would be produced by crossing : What phenotypes would be produced by crossing a grasshopper with both color stripes and one with only yellow stripes?

Breathing pattern statistics : In a study of hypnosis, breathing patterns were observed in an experimental group of subjects in a control group. The measurements of total ventilation (liters of air per minute per square meter of body area) are shown below.

Calculate the price elasticities of demand : Calculate the price elasticities of demand in each market and discuss these in relation to the prices to be charged in each market.

User Account

All Pages