Is the variable birth weight the independent variable (IV) or the dependent variable (DV)? (Write your answer as IV or DV only)

Question

BlackTom AI · Accepted Answer

An independent variable (IV) is the predictor or factor whose values are used to explain or predict changes in another variable; the dependent variable (DV) is the outcome that responds to the IV. In datasets and experiment descriptions, the IV is typically the variable thought to cause or help explain variation in the DV and is often placed on the x-axis or in the left/top column of a table.

Step-by-step reasoning:
1. Identify the two variables shown: birth weight (kg) and weight at 21 (kg).
2. Determine which variable is presented as the predictor and which as the outcome. The table lists birth weight values alongside the corresponding weight at age 21, implying we are examining how birth weight relates to later weight.
3. Apply the definitions: birth weight is the characteristic measured early (a potential predictor), and weight at 21 is the later measured outcome. Thus birth weight is used to explain or predict variation in adult weight.
4. There are no calculations required; the logic is based on temporal ordering and the role each variable plays in prediction.

Why the correct answer is correct:
- Birth weight is the hypothesized explanatory variable: researchers would examine whether different birth weights are associated with different weights at age 21. That makes birth weight the independent variable (IV).
- The dependent variable is the measured response (weight at 21), which depends on or is assessed in relation to birth weight.

Why the other option (DV) is incorrect:
- Labeling birth weight as the DV would imply that birth weight depends on weight at 21, which is temporally and conceptually backwards—the adult weight cannot cause birth weight.

Conclusion: Based on definitions, temporal ordering, and the predictor–outcome relationship shown, birth weight is the independent variable. Answer: IV. Confirmed final answer matches the provided answer: IV.

Is the variable birth weight the independent variable (IV) or the dependent variable (DV)? (Write your answer as IV or DV only)简答题

类似问题

A project has a required return of 12.6 percent, an initial cash outflow of $42,100, and cash inflows of $16,500 in Year 1, $11,700 in Year 2, and $10,400 in Year 4. What is the net present value?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单