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Question: Victor Anderson, the owner of Anderson Belts, Inc., is studying absenteeism among his employees. His workforce is small, consisting of only five employees. For the last three years he recorded the following number of employee absences, in days, for each quarter.
Quarter
Year I II III IV
2001 4 10 7 3
2002 5 12 9 4
2003 6 16 12 4
Determine a typical seasonal index for each of the four quarters.
Carry out the ANOVA and, if essential, post-hoc comparisons. Make a graph to represent group differences, and interpret ANOVA in a paragraph written in APA style.
The machine will stop working if more than three components fail. Find the probability that the machine will be working.
In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of them liked the brand Coke. Of all the Diet soda drinkers 40% liked Coke.
A video rental store has two video cameras available for customers to rent. Historically, demand for cameras has followed this distribution:
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
For a new HDTV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months.
Is there significant evidence that this production run doesn't meet specifications? Use a 1% level of significance.
If 20 measurements are taken and their standard deviation is 1.8, is there enough evidence to reject the claim that her standard deviation is within the limit at ∞ = .01?
The analysis of variances produces df between = 3 and df within = 24. For this analysis, determine df total ?
A simple random sample of 50 adults is obtained, and each person's red blood cell count (in cells per micro-liter) is measured. The sample mean is 5.23. The population standard deviation for red blood cell counts is 0.54.
You work in the corporate office for a nationwide convenience store franchise that operates nearly 10,000 stores. The per-store daily customer count has been steady,
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
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