A Medical Researcher Wondered If There Is a Significant Difference

question 85

Multiple Choice

A medical researcher wondered if there is a significant difference between the mean birth weight of boy and girl babies. She weighed a random sample of five babies of each gender. Their weights (pounds) are shown below, along with some MegaStat results.
$\begin{array}{|r|r|r|}\hline \text { Boys } & {\text { Girls }} \\\hline 5.920 & 5.740 &mean\\\hline 1.881 & 1.813&std. dev. \\\hline 5 & 5&n\\\hline\end{array}$

$\begin{aligned}8 & \text { df } \\0.1800 & \text { difference (Boys - Girls) } \\3.4125 & \text { pooled variance } \\1.8473 & \text { pooled std. dev. } \\1.1683 & \text { standard error of difference } \\0 & \text { hypothesized difference } \\0.15 & \text { t } \\.4407 & \text { p-value (one-tailed, upper) }\end{aligned}$ The population means:

• A)may be assumed equal at any customary ?.
• B)should be assumed unequal at any customary ?.
• C)are not relevant to this paired t-test.

---

Definitions:

501(c)(4) Organizations

Nonprofit groups recognized under the U.S. tax code as "social welfare" organizations, permitted to engage in advocacy and lobbying efforts to a certain extent.

Benefit Corporations

A type of for-profit corporate entity, legislated in many U.S. states, that includes positive impact on society, workers, the community, and the environment in addition to profit as its legally defined goals.

For-Profit Corporations

Business entities that operate with the primary goal of earning profits for their shareholders, differentiating from non-profit organizations.

Social Purpose Corporations

A type of business that integrates social or environmental goals with profit-making, aiming to address societal challenges through its operations and practices.