All of the Following Behaviors Are Likely to Be in Place

question 133

Multiple Choice

All of the following behaviors are likely to be in place by the age of 4 months of age EXCEPT:

• A) smiling
• B) the visually guided reach
• C) the ability to visually focus on an object in the field of vision
• D) the ability to discriminate between the mother's face and a stranger's face

---

Definitions:

Possible Means

The various average values that could be calculated from different subsets or populations of data.

Standard Error

A statistical measure that quantifies the accuracy with which a sample mean represents the population mean, often used in inferential statistics.

Null Hypothesis

The default assumption in statistical testing that there is no effect or no difference, aiming to be either rejected or not rejected based on the data analysis.

Z Test

A statistical test used to determine if there is a significant difference between a sample mean and a population mean, assuming data is normally distributed.