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a) Why do you use the chi-square statistic? Explain.
b) What type of data is used with chi square analysis? Explain
c) What are the hypotheses in a chi-square test for independence? Explain.
d) How do we calculate the expected frequencies for each cell of a contingency table? Explain.
e) How do we calculate the degrees of freedom for an r x c contingency table? Explain.
What is the difference between common cause variation and special cause variation? What should you do to improve a process when special causes of variation are present?
The salaries of the employees of a corporation are normally distributed with a mean of $25,000 and a standard deviation of $5,000.
What is Bayesian sample size determination for ANOVA and regression with formula?
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Assume that we know from previous studies that the population mean for minutes of exercise per week for college students is Uu= 100 with a standard deviation =25
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
Men are usually the snow blower accident victims. There are several factors to consider, but we're going to choose the level of operating experience between men ages 21-35.
Design a Huffman source coding scheme that can achieve lossless transmission with lessthan 90 bit/second.
What are the implications of statistical variation? Why are we interested in understanding and measuring variation?
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
A local grocery store wants to estimate the mean daily number of gallons of milk sold to customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 5.10 gallons.
Formulate an appropriate statistical model, defi ning all the terms. State the null and two-sided alternative hypotheses which reflect the research question of interest.
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