A Coffee Shop Franchise Owner Is Looking at Two Possible $\sigma$

question 41

Multiple Choice

A coffee shop franchise owner is looking at two possible locations for a new shop.To help make a decision,the owner looks at the number of pedestrians that go by each of the two locations in one-hour segments.At location A,counts are taken for 35 one-hour units and with a mean number of pedestrians of 421 and a sample standard deviation of 122.At the second location (B) ,counts are taken for 50 one-hour units with a mean number of pedestrians of 347 and a sample standard deviation of 85.Assume the two populations variances are not known but are equal.What is the pooled estimate of $\sigma$
?

• A)10.120
• B)8.262
• C)101.796
• D)6.011
• E)9.219

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Definitions:

Evaluate

To assess or appraise the value, quality, or performance of something or someone.

Effectiveness

The degree to which something is successful in producing a desired result or outcome.

Blind Observer

An individual who measures or assesses research data without knowing the hypotheses or participants' group assignments to avoid bias.

Spontaneous Remission

The unexpected improvement or cure of a disease or condition that appeared permanently, without medical intervention.