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In a pulse rate research, a simple random sample of 625 men results in a mean of 80 beats per minute, and a standard deviation of 11.5 beats per minute. Based on the sample results, the researcher concludes that the pulse rates of men have a standard deviation less than 12 beats per minutes. Use a 0.05 significance level to test the researcher's claim.
a. Identify the null hypothesis and alternative hypothesis.
b. Determine the test statistic. Show all work
c. Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, will receive no credit.
d. Is there sufficient evidence to support the researcher's claim? Explain.
seventy five percent of youths ages 12-17 have a systolic blood pressure lower than 136mm of mercury. what is the
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Using the 0.05 level of significance, evaluate the effectiveness of the program. Using the appropriate statistical table, what is the most accurate statement we can make about the p-value for this test?
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Explain how these statistics indicate that lung condition and smoking are not independent.- What's the probability that a randomly selected 60-year-old has this lung condition?
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Construct a 95% confidence interval for the proportion of Adirondack streams with a shale substrate. Clearly interpret your interval in context.
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
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