a) The population is all of the flights belonging to the particular airline. It's not all flights in general because the airline does not have control over a rival company's flight schedule.
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b) The sample is the 5 airlines the company selected. Ideally the sample should represent the population as much as possible. The larger the sample, the more representative the sample is.
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c) No, the sample is likely <u>not</u> representative because one day of flight does not represent the entire lifetime of all flights done so far for that company. This particular day could have been a very good day with good weather, which may explain why the 5 flights were all on time.
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d) It would be better for the company to select the days at random and sample all of the flights for those particular days chosen. This is a cluster sample. Each cluster is a day. Also, I think more flights should be sampled. Five flights does not seem like enough.
Step-by-step explanation:
<em>=</em><em>></em><em> </em><em>x+</em><em>x=</em><em>3</em><em>6</em><em> </em><em> </em>
<em>=</em><em>></em><em> </em><em>2</em><em>x</em><em>-</em><em>1</em><em>8</em><em>=</em><em>3</em><em>6</em>
<em>=</em><em>></em><em>2</em><em>x</em><em>=</em><em>1</em><em>8</em>
<em>=</em><em>></em><em>9</em>
<em> </em><em> </em><em>check</em>
<em> </em><em> </em><em>2</em><em>(</em><em>9</em><em>)</em><em>+</em><em>1</em><em>8</em>
<em> </em><em> </em><em> </em><em>1</em><em>8</em><em>+</em><em>1</em><em>8</em>
<em> </em><em> </em><em> </em><em>=</em><em>3</em><em>6</em>
<em>i</em><em> </em><em>hope </em><em>it's </em><em>right</em>
<em> </em><em> </em>
Answer:
4.5 miles
Step-by-step explanation:
Distance = 9 inches
1 inch = 1/2 mile
9 / 1/2 = 4.5
9 inch = 4.5 miles
Pitch changes are heard when the doppler effect occurs should be the answer. I'm pretty sure.
