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The mean=25 and the standard error=8. If samples of size n=16 are selected, can we say anything about the(x-bar)distribution of sample means?
As the manager of Tennessee Grilled Pork, you have been aslned to examine the company's national employment data and perform a follow-up study
Obtain an estimated value and its standard error (either from data or by educated guess) for each of two situations important to your business interests.
Construct a 95% confidence interval for the population mean income level per month, assuming the population has a normal distribution.
Applying the MSE measure of forecast accuracy, would you prefer a smoothing constant of x = 0.1 or x = 0.2 for the gasoline sale time series.
According to the U.S. National Center for Health Statistics, the mean height of 18 -24 year old American males is = 69.7 inches.
What is the probability that the sample mean would be between $41,000 and $43,000 if we increased the sample size to 100?
A family is considering a move from a midwestern city to a city in California. The distribution of housing costs where the family currently lives is normal
A random sample of size n is to be drawn from a population with a mean = 500 and sd = 100.
A population has a mean of 7 and a standard deviation of 9.6. A sample size n = 64 is drawn. What is the standard error of the mean?
Ashland MultiComm Services has identified 15 errors attributed to cost of customer service in the past year.
Is the correlation between variables 9 and 4 significant? Is this correlation relevant to practice? Provide a rationale for your answer.
The clinical stages of HIV-1 are divided into distinct phases: Eclipse phase, and Fiebig stages I, II, III, IV, V, and VI
Determine whether each of the variables is qualitative or quantitative, and why? Determine if they are discrete or continuous, and why.
Conduct a mini-meta-analysis. There is really no such thing as a mini-meta-analysis, but you don't have time to conduct a full meta-analysis.
What are these? How are they relevant to statistics and how do you use them?
Two rival book companies offer a special discount deal to a college for textbooks in math and science.
A researcher is interested in whether participating in sports positively influences self-esteem in young girls.
How do you know this DV is measured on a continuous scale? Now, how would you word the null hypothesis for your sample study?
Describe a kind of measure he could use for the DV that would result in scores that are on a continuous scale of measurement.
The distribution of SAT scores is normal with µ=500 and s=100.
What is sampling with replacement and why is it used?
Imagine that you are collecting data to determine what factors influence an individual's general satisfaction with life
Consider a system that has 4 computers. The system is down if at least one computer crashes. The system works if all 4 computers are working
Suppose that we will take a random sample of size n from population having mean µ and standard deviation s.