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It is known that the weight of cats has standard deviation 3 pounds. We want to estimate the mean weight of the entire population of cats using a sample of 40 randomly selected cats.
(a) Find the standard deviation of the sample mean.(b) Find the probability that the sampling error is less than 1 pound.(c) Suppose that, for our sample, the mean weight is 11 pounds. How con?dent can we be that the population mean is between 10 and 12 pounds?
Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection system appear to be fair?
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
Please explain by using the traditional methods for testing hypotheses and showing the results of all steps in the process.
Standard deviation of 14 inches. What is the probability that the mean annual snowfall will be between 70 and 80 inches.
Could you please explain in words how you figure out deciles, quartiles, kurtosis, skewness in Excel? How do you find the sum count, largest, and smallest in Excel?
Explain the difference between a left-tailed, two-tailed, and right-tailed test. When would we choose a two-tailed test? How can we tell the direction of the test by looking at a pair of hypothesis?
Compute Cronbach's alpha on the scale provided on pp. 710-711 of the Field text using the SAQ.sav file.
Determine the value of population mean? What is the best evaluate of this value?
Determine the probability that the project will be completed in 90 days or less.
According to the regional bar assoc., 60% of people who take the bar exam pass. Find the approximate probability that at least 61% of 200 randomly selected people taking the bar will pass. Round to three decimal places as needed.
Using a present value table, your calculator, or a computer program present value function, answer the following questions. Assistance is needed with the formula to calculate the problems:
Describe a problem (real or fictitious) for which it will be appropriate to utilize a hypothesis test. Describe how data will be collected, sample size, assumptions, level of measurement etc.
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