Final answer:
The dedendum is not always smaller than the addendum in gear design, making the correct answer B) False. For matched sample hypothesis tests, choices B and C are correct since paired samples involve related measures and comparisons of their means.
Step-by-step explanation:
The student appears to be asking about gear terminology in the context of engineering or mechanical design. Specifically, the terms dedendum and addendum refer to components of a gear tooth. The addendum is the height of the tooth above the pitch circle, while the dedendum is the depth of the tooth below the pitch circle. Contrary to the statement given, the dedendum is not necessarily smaller than the addendum; this relationship can vary depending on the gear design specification. Therefore, the correct answer to the statement "The dedendum is always a little smaller than the addendum" is B) False.
When it comes to matched or paired sample hypothesis tests, the key points are that the samples are related, often involving repeated measures on the same subjects. Here, answer choice B) Two measurements are drawn from the same pair of individuals or objects, and answer choice C) Two sample means are compared to each other are both true. The correct answer to this part of the question is therefore D) Answer choices b and c are both true.