# State the major elements of a sampling plan What is simple random sampling Descr

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State the major elements of a sampling plan
What is simple random sampling
Describe and give an example of systematic, stratified, cluster, and continuous process sampling methods
What is an unbiased estimator, and why is it important in statistics?
Explain the difference between sampling and non-sampling error
What happens to the distribution of the sample mean as the sample size increases?
What is the sampling distribution of the mean?
Define the standard error of the mean, and explain how to compute it
What does the central limit theorem state, and of what value is it?
Explain when to use the standard error in probability calculations versus using the standard deviation of the population
What is an interval estimate?
Explain the difference between a probability interval and a confidence interval
What does the level of confidence specify?
Explain the differences in the formulas used to compute confidence intervals for the mean with known and unknown standard deviations
How does the t-distribution compare with the normal distribution?
How does a prediction interval differ from a confidence interval?
Why are prediction intervals wider than confidence intervals?
Explain why it is important to determine the proper sample size to use in a survey
How do you find the sample size for a proportion if no good estimate of the population proportion is available?
Explain the difference between the null and alternative hypotheses
List the steps in the general hypothesis-testing procedure
State the three types of one-sample hypothesis tests
Why is it important to identify the alternative hypothesis based on what we wish to provide statistical evidence for?
Explain the concepts of Type I and Type II errors
Explain the differences between a one-tailed and two-tailed hypothesis test
How do you use a test statistic to draw a conclusion about a hypothesis test?
What is a p-value, and how is it used?
State the only correct forms of two-sample hypothesis tests
What Excel procedures are available for conducting two-sample hypothesis tests?
How does a paired sample test for means differ from other two-sample hypothesis tests for means?
Explain how to conduct a test for equality of variances
What hypotheses does ANOVA test?
How can use the F, P-value, and F crit values from the Excel ANOVA: Single Factor procedure to draw a conclusion?
What assumptions does ANOVA rely on?
What hypothesis does the chi-square test for independence test?
Why is it important to understand independence of categorical variables in business applications?
Explain the steps required to conduct chi-square tests for independence and normality in Excel
What cautions should you be aware of in using the chi-square test for independence?

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