Posted by Anonymous on Saturday, August 24, 2013 at 6:49pm.
In a population of over 15,000 patients, the distribution of systolic blood pressure follows the normal curve. Investigators believe the average systolic blood pressure in the population is 120 mm. The investigators take a simple random sample of 6 patients from this population. The systolic blood pressure measurements of these patients have an average of 113.5 mm and an SD (computed with 6 in the denominator) of 12.2 mm. Is the average systolic blood pressure in the population lower than the investigators think? Or is this just chance variation?
The null hypothesis is:
The average blood pressure in the population is 120 mm.
The average blood pressure in the population is less than 120 mm.
The average blood pressure in the population is not equal to 120 mm.
The approximate distribution of the test statistic is (pick the best option)
The test is
The P-value of the test is approximately _______%
“The test supports what the investigators think.”
The quoted statement is
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