A Quality Control Inspector Keeps a Tally Sheet of the Numbers

question 24

Short Answer

A quality control inspector keeps a tally sheet of the numbers of acceptable and unacceptable products that come off two different production lines. The completed sheet is shown below. $$\begin{array} { | c | c | c | } \hline \text { Production line } & \begin{array} { c } \text { Acceptable } \\\text { products }\end{array} & \begin{array} { c } \text { Unacceptable } \\\text { products }\end{array} \\\hline 1 & 152 & 48 \\\hline 2 & 136 & 54 \\\hline\end{array}$$ Estimate with 95% confidence the difference in population proportions.

---

Definitions:

Phi Phenomenon

The visual trick of seeing ongoing movement in distinct items observed quickly one after the other.

Recency Effect

The tendency to remember the most recently presented information best, which can affect how memories are retrieved.

Chunking Effect

A memory strategy that involves grouping information into manageable units or "chunks" to enhance the ability to remember it.

Relearning

The process of learning material or skills previously studied then forgotten, often occurring more quickly than the initial learning.