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1. Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
2. If A and B are mutually exclusive events and the P(A) = .15 and the P(B) = .55, what is the P(event A or event B)?
3. Given the following data, calculate a 3 period moving average. 10, 18, 18, 20, 17, 32, 20, 31, 29.
Determine the coefficient of correlation between the two variables. Interpret the value.
Obtain a test statistic and p -value. Interpret the results at α = .01.
What is the probability of obtaining 4 ones in a row when rolling a fair, six-sided die? Interpret this probability.
Find the expected GPA when SAT = 800. Find E (GPA|SAT = 1,400). Comment on the difference.
For each of the following problems, assume that the homogeneity of variance assumption has not been met and that you will need to use the adjusted Welch statistic.
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
Use a scatter plot to determine the relationship between the x values and the y values.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots. A partial ANOVA table
Determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
Compute the two groups using Paired sample t-test. Compute which modification reduced the number of traffic accidents
The sample mean of the number of spots on the 6000 rolls, should be about If this die is rolled 6000 times, the number of times we get a 2 or a 3 should be about
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