Find the Range, Variance, and Standard Deviation for Each of the Two

question 66

Multiple Choice

Find the range, variance, and standard deviation for each of the two samples, then compare the two sets of results.
-The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency distribution below summarizes the results. Find the standard deviation. Round your answer to one decimal place. $$\begin{array}{l}\text { Waiting tim\& Number of }\\\begin{array} { c | c } \text { (minutes } & \text { customer } \\\hline 0 - 3 & 12 \\4 - 7 & 14 \\8 - 11 & 10 \\12 - 15 & 13 \\16 - 19 & 0 \\20 - 23 & 1\end{array}\end{array}$$

• A)4.9
• B)5.2
• C)7.0
• D)4.7

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Definitions:

Hair Cells

Sensory cells located in the inner ear, crucial for converting sound vibrations into neural signals for hearing and helping with balance.

Inner Ear

Part of the ear that contains the sensory organs for hearing and balance; contains the bony and membranous labyrinth.

Oscillation

A repetitive variation or fluctuation, typically in time, of a system about a central value or between two or more different states.

Eyes

Organs of the visual system that allow one to perceive light and convert it into electrochemical signals for interpretation by the brain.