Find out the cut-off value for a t-test
Please explain the process of how you find out the cut-off value for a t-test(t critical) and F test (F critical)? Look up the cutoff value for a t-test with df=15, p=.05 with a one-tailed test.
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A study of high-crime locations in Miami, Florida, was conducted. The number of crimes in each of eight sample areas throughout a one-year period was recorded. Then a neighbourhood watch program was inaugurated.
Air has the density of 1.225 kg per cubic meter. Assume Tower was contained in the cylinder. Determine mass of air in cylinder. Is this more or less than mass of Tower?
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A study was performed in Basel, Switzerland, on relationship between the concentration of plasma antioxidant vitamins and cancer risk. Below shows data for plasma vitamin-A concentration for stomach cancer cases and controls.
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Also, if instead, left-handed females make up 6% of population, determine the conditional probability that randomly selected subject is left-handed, given that the subject is male?
Perform appropriate t-test to compare the mean systolic blood pressure between two populations using ?=0.05. You may suppose that the variances of two populations are equal. What do you conclude?
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