Instruction 3-3
the Stem-And-Leaf Display Below Represents the Number of Vitamin

question 52

Short Answer

Instruction 3-3
The stem-and-leaf display below represents the number of vitamin supplements sold by a health food store in a sample of 16 days.
$$\begin{array} { c l } \text { Stem } & \text { Leaves } \\\hline \hline 1 \mathrm { H } & 99 \\2 \mathrm {~L} & 0023 \\2 \mathrm { H } & 567 \\3 \mathrm {~L} & 034 \\3 \mathrm { H } & 568 \\4 \mathrm {~L} & 1\end{array}$$ Note (1): 1H means the "high teens" = 15,16,17,18,or 19;2L means the "low twenties" = 20,21,22,23,or 24;2H means the "high twenties" = 25,26,27,28,or 29,etc.
Note (2): For this sample,the sum of the observations is 448,the sum of the squares of the observations is 13,356,and the sum of the squared differences between each observation and the mean is 812.
-Referring to Instruction 3-3,the variance of the number of vitamin supplements sold in this sample is ________.

---

Definitions:

Unpleasant Event

An occurrence that is disagreeable, distressing, or unwelcome, causing discomfort.

Punishment

Punishment involves imposing a penalty or negative consequence on an individual or group as a response to an undesired action or behavior, with the intent of discouraging that behavior.

Pleasant Event

An occurrence or activity that brings about enjoyment, happiness, or satisfaction.

Kaizen

A Japanese business philosophy of continuous improvement of working practices, personal efficiency, etc.