A Frequency Distribution Has a Mean of 200 and a Standard

question 83

Multiple Choice

A frequency distribution has a mean of 200 and a standard deviation of 20. The class limits for one class are 220 up to 240. What are the standard normal z-statistics for the class limits?

• A)−20 and 20
• B)−2.0 and −1.0
• C)200 and 220
• D)1.0 and 2.0

---

Definitions:

Concept of Conservation

A cognitive ability in child development whereby the child learns that quantity or amount does not change despite a change in the form or arrangement of objects.

Object Permanence

The understanding that objects continue to exist even when they cannot be observed or heard, a concept developed during early childhood.

Abstract Reasoning

The ability to analyze information, detect patterns and relationships, and solve problems on a complex, abstract level.

Basic Trust

A fundamental sense of confidence in the reliability and predictability of the world, often developed in early childhood.