A Proofreader Checked 160 Ads for Grammatical Errors Under the Null Hypothesis of a Uniform Distribution, the Expected

question 25

Multiple Choice

A proofreader checked 160 ads for grammatical errors. The sample frequency distribution is shown: $$\begin{array} { | l | c | c | c | c | } \hline \text { Number of Errors } & 0 & 1 & 2 & 3 \\\hline \text { Observed Frequency } & 10 & 65 & 71 & 14 \\\hline\end{array}$$ Under the null hypothesis of a uniform distribution, the expected number of times we would get 0 errors is:

• A)10.
• B)20.
• C)30.
• D)40.

---

Definitions:

General Annuity

An annuity in which the payment interval does not equal the compounding interval.

Annuity Due

An annuity in which the periodic payments occur at the beginning of each payment interval.

Compounded Monthly

Definition: The process where interest is calculated and added to the principal amount of the deposit or loan every month.

Lump Sum Deposit

A single and typically large payment made at once rather than being divided into multiple payments over time.