A researcher is interested in the amount of soda consumption for males and females compared to...

A researcher is interested in the amount of soda consumption for males and females compared to the population. Suppose that the researcher selects a sample of n = 36 male undergraduates and a sample of n = 25 female undergraduates. On average, males reported consuming M = 2.45 drinks per month, while females averaged M = 1.47 drinks per month. Assuming an overall average for undergraduates of μ= 1.85 drinks per month with a standard deviation σ=1.2, please answer the following questions:
1. Does this sample of males consume significantly more sodas than the overall population average? Use a one-tailed test with α = .05.
2. Does this sample of females consume significantly fewer sodas than the overall population average? Again, use a one-tailed test with α = .05.
Knowing that the mean of the WAIS-IV is 100 and the standard deviation is equal to 15, what is the probability of randomly selecting an individual with a score of 105 or worse?

Solutions

Expert Solution

(a)

Conclusion: There is evidence to conclude that this sample of males consume significantly more sodas than the overall population average.

(b)

Conclusion : There is no evidence to conclude that this sample of females consumes significantly fewer sodas than the overall population average.

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orchestra answered 1 year ago

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