Use the Given Frequency Distribution to Find the
(A)class Width

question 111

Multiple Choice

Use the given frequency distribution to find the
(a) class width.
(b) class midpoints of the first class.
(c) class boundaries of the first class.
- $$\begin{array}{l}\text { Miles (per day) }\\\begin{array} { c | c } \text { Class } & \text { Frequency, } \mathrm { f } \\\hline 1 - 2 & 9 \\3 - 4 & 22 \\5 - 6 & 28 \\7 - 8 & 15 \\9 - 10 & 4\end{array}\end{array}$$ 2 8
5

• A) (a) 2
• (b) \(1.5\)
• (c) \(0.5 - 2.5\)
• B) (a) 1
• (b) \(1.5\)
• (c) \(0.5 - 2.5\)
• C) (a) 2
• (b) 1
• (c) \(1 - 2\)
• D) (a) 1
• (b) 1
• (c) 1-2

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Definitions:

Nonparametric Method

Statistical methods that do not assume a specific distribution for the data, making them applicable to a wider range of data types.

Normality Requirement

The assumption that the data or the residuals in a statistical model are normally distributed.

Parametric Test

A category of hypothesis tests that assumes underlying statistical distributions in the data and usually involves parameters such as the mean or variance.

Wilcoxon Rank-sum Test

A nonparametric statistical test used to compare two independent samples, based on the ranks of their values, to determine if there are significant differences between them.