Is this a directional or nondirectional test?
Lauren is in charge of quality control for the coffee company she works for. Recently, she has become worried because of an increase in customer complaints about the acid levels of her company’s French Roast coffee. The acid level in her company’s French Roast coffee should be normally distributed with a ? = 25 mg/cup and a ? = 15 mg/cup. She randomly samples 36 bags of French Roast and finds their mean acidity level to be 28 mg/cup. Does Lauren’s sample of coffee bags differ significantly from the population? What does this mean for her company?
Ans: Strictly speaking, Lauren needs to conduct a one-tailed (directional) test because customers have been complaining about too much acidity in their coffee.
You might also like to view...
Assume an A-B-C design has been effective and ends with both the B and C interventions being implemented. Explain how the sequencing or cumulative effect diminishes the researcher's ability to assume there is a functional relationship between the independent variables and the dependent variable
What will be an ideal response?
A large portion of current educational leaders are expected to retire over the next 3 years
Indicate whether this statement is true or false.
The discussion of the book before the story is read is just as important as reading the story
Indicate whether the statement is true or false
Which philosophers are credited with helping to launch the Western tradition of care and education for young children?
a. Parmenides and Zeno b. Kierkegaard and Nietzsche c. Marx and Engels d. Plato and Aristotle