【急】华南理工大学商务统计学求教,

【急】华南理工大学商务统计学求教,
Statistics
Whatis the difference between a sample and a population?
Whatis the difference between a statistic and a parameter
Whatis the difference between a categorical variable and a numerical variable?
Whatis the difference between descriptive statistics and inferential statistics?
Compareand contrast the bar chart for categorical data with the histogram for numericaldata?
Whatis the difference between a time-series plot and a scatter plot?
Whatare the difference among the mean,median and mode?
Whatare the advantages and disadvantages of the mean,median and mode?
Whatis meant by the property of central tendency?
Whatis meant by the property of variation?
Whyis the sample mean an unbiased estimator of the population mean?What is thedifference among sampling methods:simple random sampling,stratified sampling,cluster sampling,systemic sampling?
Whydoes the standard error of the mean decrease as the sample size n increase?
Underwhat circumstances does the sampling distribution of the proportionapproximately follow the normal distribution?
Whenare you able to use the t distribution to develop the confidence intervalestimate for the mean?
Whenare you able to use the z distribution to develop the confidence intervalestimate for the mean?
Whatis the difference between a Type I error and a Type II error?
Whatis the meant by a p-value?
Whatis the six-step critical value approach to hypothesis testing?
Whatis the five-step p- value approach to hypothesis testing?
Whatare the assumptions of ANOVA?
Underwhat conditions should you select the one-way ANOVA F test to examine possibledifferences among the means of c independent populations?
Whenand how should you use multiple comparison procedures for evaluating pairwisecombinations of the group means?
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