​The First Telephone Was Invented and Patented by Alexander Graham

question 47

Multiple Choice

​The first telephone was invented and patented by Alexander Graham Bell in ________.

• A) ​1776
• B) ​1876
• C) ​1886
• D) ​1906

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Definitions:

Wilcoxon Rank-sum Test

A nonparametric test used to assess whether there is a significant difference between two independent samples based on median comparison.

Kruskal-Wallis Test

A nonparametric statistical test used to compare three or more groups or samples that do not meet the assumption of normality.

Left-tailed Wilcoxon Rank Sum Test

A nonparametric test used to assess whether one of two groups of independent samples tends to have lower values than the other.

Test Statistic

A calculated value from sample data used to test a hypothesis against a null hypothesis.