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The accompanying data indicate the number of mergers that took place in an industry over a 19-year period.
Year Mergers Year Mergers Year Mergers
1 23 8 64 14 150
2 23 9 47 15 165
3 31 10 96 16 192
4 23 11 125 17 210
5 32 12 140 18 250
6 32 13 160 19 300
7 42
a) Fit a least squares trend line to the merger data.
b) What type of trend (linear or curved) might best fit to this time series?
c) Compute the forecast for year 20 based on the trend (linear or curved) that best fits the data?
What is a point estimate for the population mean µ?
Express the null hypothesis and the alternative hypothesis in symbolic form: An entomologist writes an article in a scientific journal, which claims that fewer than 7 in ten thousand male fireflies are unable to produce light due to a genetic muta..
At α = .01, did yellow fire trucks have a considerably lower accident rate? Determine sample proportions and z test statistic.
The accompanying table summarizes randomly selected sample data for San Francisco Defendants in burglary cases.
In this paragraph, be sure to make it clear how you handled the issue of conducting three planned comparisons. Also provide the ANOVA summary table for these results.
Find the critical value for different types of sample size and level of significance:
Could the interval be used to estimate the mean amount of time a 9-year-old American spends eating & drinking each day. Explain.
How should the candidate purchase the five commercials to maximize the estimated number of additional voters?
Determine the range and standard deviation of the times.
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Assuming 250 of each sex, can we conclude that there is a significant difference in the proportions at a 0.05 level of significance?
The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?
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