Examlex
The file Danish Coffee contains a random sample of 144 Danish coffee drinkers and measures the annual coffee consumption in kilograms for each sampled coffee drinker. A marketing research firm wants to use this information to develop an advertising campaign to increase Danish coffee consumption. Based on the sample's results, what is the best point estimate of average annual coffee consumption for Danish coffee drinkers?
Wilcoxon Signed Rank Test
A non-parametric test that compares two paired or matched samples to assess if their population mean ranks differ.
Significance Level
A threshold in hypothesis testing that determines the probability of rejecting a null hypothesis when it is true, commonly set at 0.05 or 5%.
Wilcoxon Signed Rank Sum Test
A non-parametric statistical hypothesis test used to compare two related samples, matched samples, or repeated measurements on a single sample to assess whether their population mean ranks differ.
Nonzero Differences
Differences between values or measurements that are not equal to zero, indicating variation or change.
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