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In practice, people do not know the population mean like you did in step 2 and do not have several estimates to get a sampling distribution of a sample mean. Suppose you have only one sample. In that case you would need to use theoretical results.
If you have studied the central limit theorem, find the margins of error associated with a chance of .90 and a chance of .95. Compare these values with those calculated in step 2.
there are 30000 students enrolled at city university. a simple random sample of 1600 city university students was taken
Define validity and reliability. How can we insure our data is both reliable and valid? Which of these two do you think is the more important?
Calculate Cohen's d measure effect size for both tests (σ = 20 and σ = 10). Explain how sample size affect outcome of hypothesis test. How does sample size affect measures of effect size?
a soft-drink machine is regulated so that it discharges an average of 200 milliliters per cup. if the amount of drink
a study found a strong positive correlation between ice cream consumption and the number of violent crimes committed
find an online report of a simple research study that includes statistics. you must include website link to the report
let x represent the number that occurs when a green die is tossed and y the number that occurs when a red die is
Part 1. A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer
A 12.37 g sample of Mo2O3(s) is converted completely to another molybdenum oxide by adding oxygen. The new oxide has a mass of 13.197 g. Add subscripts below to correctly identify the empirical formula of the new oxide.
discuss what satisfying assumption 1-3 for regression inferences by the variables under consideration would mean. an
Assuming normality of distribution of yield rates, if senior management has set a goal of 9% for yield, what is the lower capability index? In what proportion of the time will the goal be met?
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