Use the Sign Test to Test the Indicated Claim

question 61

Essay

Use the sign test to test the indicated claim. An instructor gives a test before and after a lesson
and results from randomly selected students are given below. At the 0.05 level of significance,
test the claim that the lesson has no effect on the grade. Use the sign test. $$\begin{array} { l l l l l l l l l l l l l l l l } \text { Before } & 54 & 61 & 56 & 41 & 38 & 57 & 42 & 71 & 88 & 42 & 36 & 23 & 22 & 46 & 51 \\\hline \text { After } & 82 & 87 & 84 & 76 & 79 & 87 & 42 & 97 & 99 & 74 & 85 & 96 & 69 & 84 & 79\end{array}$$

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Definitions:

Collection Agency

A business that pursues payments of debts owed by individuals or businesses.

Overdue Account

An account that has not been paid by the due date, often subject to late fees and penalties.

Invoice

A document issued by a seller to a buyer that lists goods or services provided, their prices, and the total amount owed.

Ledger Statement

A comprehensive record that captures all financial transactions of a business or individual, categorized into accounts.