Instruction 10-4
a Real Estate Company Is Interested in Testing $\quad \bar { X } _ { \mathrm { G } } = 35$

question 20

Multiple Choice

Instruction 10-4
A real estate company is interested in testing whether the mean time that families in Gotham have been living in their current homes is less than families in Metropolis.Assume that the two population variances are equal.A random sample of 100 families from Gotham and a random sample of 150 families in Metropolis yield the following data on length of residence in current homes.
Gotham: $\quad \bar { X } _ { \mathrm { G } } = 35$ months, $\quad S _ { \mathrm { G } } ^ { }² = 900$
Metropolis: $\quad \bar { X } _ { M } = 50$ months, $\quad S _ { M ^ { 2 } } = 1,050$
-Referring to Instruction 10-4,what is a point estimate for the mean of the sampling distribution of the difference between the two sample means?

• A)-10
• B)0
• C)-22
• D)-15

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Definitions:

Nasal Cavity

The interior space of the nose, lined with mucosa, involved in breathing and the olfactory process.

Pharynx

A muscular tube that connects the mouth and nasal passages with the esophagus and larynx, playing a key role in both the respiratory and digestive systems.

Hyperventilates

Excessively rapid or deep breathing, which can lead to a decrease in carbon dioxide in the blood, causing lightheadedness or tingling of the limbs.

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air and absorbed by plants in photosynthesis.