Miller (2008) examined the energy drink consumption of college undergraduates an
ID: 3377318 • Letter: M
Question
Miller (2008) examined the energy drink consumption of college undergraduates and found that males use energy drinks significantly more often than females. To further investigate this phenomenon, suppose that a researcher selects a random sample of n = 36 male undergraduates and a sample of n = 25 females. On average, the males reported consuming M = 2.45 drinks per month and females had an average of M = 1.28. Assume that the overall level of consumption for college undergraduates averages = 1.85 energy drinks per month, and that the distribution of monthly consumption scores is approximately normal with a standard deviation of = 1.2. Did this sample of females consume significantly fewer energy drinks than the overall population average? Use a one-tailed test with = .01.
H0: The amount of energy drinks consumed by the female college students will be (greater than or equal to/less than or equal to) _____ the population mean of = 1.85.
H1: The amount of energy drinks consumed by the female will be (greater/less) ______ than the population mean of = 1.85.
The critical region consists of a proportion of sample means equal to (2 decimal places required) ______, which correspond to z-scores beyond the critical boundaries of (2 decimal places required) z = ______.
The expected value of M is (2 decimals required) _______, and the standard error of the mean is (2 decimals required) _______.
The z-score corresponding to our sample mean is (2 decimals required) _____, which is located (within/outside) ______ the boundaries of the critical region.
The effect size for our study has a Cohen's d value equal to (3 decimals required) ______, which is a (small/medium/large) ______ effect.
Write a sentence describing the outcome of the hypothesis test from the previous question as it would appear in a research report. Note: Correct answers must include all of the following: the conclusion of the test in terms of the IV and DV, test statistic, p-value, and the measure and value of the effect size.
Please show work and explain.
Explanation / Answer
Miller (2008) examined the energy drink consumption of college undergraduates an