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The mean BMI in patients free of diabetes has been reported as 28.2. An investigator measured BMI in 12 patients who are free of diabetes and found a mean BMI of 31.7 with a standard deviation of 5.9. The investigator hypothesizers that the BMI in patients free of diabetes is higher than what h been reported. Is there evidence that the BMI is significantly higher than 28.2? Use a 5% level of significance. You must report the null and alternative hypotheses, calculate the test statistic, and give the conclusion including a comparison to alpha or the critical value.
the average life of a certain type of small motor is 10 years with a standard deviation of 2 years. the manufacturer
A Myrtle Beach resort hotel has 120 rooms. In the spring months, hotel room occupancy is approximately 75%. What is the probability that at least half of the rooms are occupied on a given day?
You're considering investing in a portfolio of the common stocks of four publicly-traded companies with betas as follows:
Find the Probability and prove that the given two events are mutually exclusive and independent or not.
when performing a one-way anova the error sum of squares can be obtained by subtracting the treatment sum of squares
a system consists of three components that operate independently. in order for the system to work component 1 must work
You are presented a 90% confidence interval for the difference in population mean scores (with drug - without drug) of (-17.81, -7.24). What can you conclude from this interval?
Psychological Statistics
Determine the variance of X? (Illustrate your computation either in Table or in Equation form)
describe the direction of the relationship between the hamstring strength index 60degs and the shuttle run test.
what is the critical f value for a sample of 9 observations in the numerator and 6 in the denominator? use a two-tailed
suppose a random variable t has cdf ft and assume ft is continuous. what is the cdf of
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