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What is the critical F value for a sample of 9 observations in the numerator and 6 in the denominator? Use a two-tailed test and the 0.1 significance level. (Round your answer to 2 decimal places.)
Is there evidence of difference in median performance between two methods? (Use α = 0.05.)
Explain the difference between testing a single mean and testing the difference between two means. What two assumptions must be met when one is using z test to test differences between two means?
a researcher is investigating the effectiveness of a new medication for lowering blood pressure for individuals with
To find out whether living next to high-voltage power lines increases your chance of getting cancer, researchers selected various homes at random.
consider the following data for two independent random samples taken from two normal populations.sample 1 10 7 13 7 9
Use Are the data statistically significant at the given level of significance? Based on your answers, will you reject or fail to reject the null hypothesis?
q1. an investigator hypothesizes that cholesterol level in children might be affected by educating their
1.a library determines that its books are returned on time 90 of the time. if 450 books are checked out what is the
A mathematical placement test is given to all entering freshmen at a small college. A student who receives grades below 35 is denied admission to the regular mathematics course and placed in a remedial class.
A survey of 600 non-fatal accidents showed 259 involved the use of a cell phone. Construct a 99% confidence interval for the proportion of fatal accidents that involved the use of a cell phone?
suppose that pa 0.4 and pacapb 0.12a find pbab are the events a and b mutually exclusive?if pb 0.3 are events a and
Test whether the mean weight is greater than 16 ounces with P-value approach.
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