The Worldwide Drop in Sperm Counts Among Men Has Been

question 36

Multiple Choice

The worldwide drop in sperm counts among men has been attributed to _______________.

• A)endocrine disruptors
• B)teratogens
• C)allergens
• D)DDT
• E)radon

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Definitions:

Alternative

Refers to the alternative hypothesis in statistical testing, which contrasts the null hypothesis by suggesting there is a significant effect or difference.

T-statistic

A ratio used in hypothesis testing that compares the difference between an observed sample mean and a hypothetical population mean to the standard error of the mean.

Alpha

A coefficient that often represents the level of significance in hypothesis testing, marking the threshold for rejecting the null hypothesis.

Critical Value

A point on a statistical distribution that represents the threshold for significance testing, helping decide whether to reject the null hypothesis.