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Suppose the annual consumption of chicken mean is 20.84 pounds per person and that the standard deviation for the consumption of chicken per person is 9.193 pounds. The mean weight of chicken consumed for a sample of 200 randomly selected people is one value of many that form the sampling distribution of sample means.
Describe the shape of this sampling distribution?
What is the mean value for this sampling distribution?
What is the standard deviation of this sampling distribution?
Test the hypotheses that the average household income in the township is greater than $100,000. Hint: Start by stating the null and alternative hypotheses.
A survey of 10 different suburbs in Dallas Texas found the average gasoline to be $ 1.294 a gallon with a standard deviation of $ .0526. What is the critical value using a=.05 and what is the test value.
Hypothesis testing of single mean - The Wall Street Journal reported that the 30-year mortgage rate is now less than 6%.
How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..
a) What statistical test should be used to analyze these data? b) Identify H0 and Ha for this study. c) Conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude?
Compute the population attributable risk for smoking and lung cancer.
A newspaper ad for a manager trainee position contained the statement "Our manager trainees have a first-year earnings average of $20,000 to $24,000." Do you think that the ad is describing a confidence interval? Explain your answer.
You sample a group of computers and use the sample statistics to calculate a 95% confidence interval of (-10.95, -1.5). This interval estimates the difference of (average boot time (HDD) - average boot time (SSD)). What can we conclude from this i..
Is there evidence of violations of the usual ANOVA assumptions of equal variances and normal populations? Set up and perform appropriate TESTS at the α = 0.05 level of significance.
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
Use the relative frequency approach to construct a probability distribution for the number of tests taken.
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