Consider the Following Stem and Leaf Plot $$\begin{array} { c l } \text { Stem } & \text { Leaf } \\1 & 0,2,5,7 \\2 & 2,3,4,8 \\3 & 0,4,6,6,9 \\4 & 5,8,8,9 \\5 & 2,7,8\end{array}$$

question 62

Multiple Choice

Consider the following stem and leaf plot:
$$\begin{array} { c l } \text { Stem } & \text { Leaf } \\1 & 0,2,5,7 \\2 & 2,3,4,8 \\3 & 0,4,6,6,9 \\4 & 5,8,8,9 \\5 & 2,7,8\end{array}$$
Suppose that a frequency distribution was developed from this plot, and there were 5 classes (10-under 20, 20-under 30, etc.) .What would be the relative frequency of the class 20-under 30?

• A)0.4
• B)0.25
• C)0.20
• D)4
• E)0.50

---

Definitions:

Inference

The process of drawing conclusions about a population based on a sample.

Parameters

Statistical or mathematical conditions and variables that define the scope and functioning of a model, equation, or procedure.

Level of Significance

A threshold in hypothesis testing that determines the probability at which the null hypothesis is rejected.

Type I Error

The incorrect rejection of a true null hypothesis, also known as a "false positive," indicating a test's incorrect indication of a significant effect.