Respuesta :
Answer:
The estimate of the percentage of millionaires in each of these cities:
             Bridgeport    San Jose   Washington   Lexington Park
                CT         CA        D.C.         MD
Percentage of
Millionaires       9%         12%        9%         8.3%
Step-by-step explanation:
Data and Calculations: Â Â Â Â Â Â Â Â Â Â Â Â Â Â City
              Bridgeport,   San Jose,  Washington,  Lexington Park,
Millionaire          CT         CA        D.C.         MD
Yes               45          36        36           33
No                455        264       364         367
Sample            500        300       400         400
Percentage of
 Millionaires       45/500     36/300     36/400      33/400
= Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.09 Â Â Â Â Â Â Â 0.12 Â Â Â Â Â Â 0.09 Â Â Â Â Â Â 0.0825
= Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 9% Â Â Â Â Â Â Â Â 12% Â Â Â Â Â Â Â 9% Â Â Â Â Â Â Â 8.3%
Using the percentage concept, it is found that the estimate of the percentage of millionaires in these cities is of 9.25%.
What is a percentage?
The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:
[tex]P = \frac{a}{b} \times 100\%[/tex]
Researching the problem on the internet, it is found that:
- A total of 45 + 34 + 37 + 32 + 455 + 266 + 363 + 368 = 1600 people were surveyed, hence b = 1600.
- Of those, 45 + 34 + 37 + 32 = 148 are millionaires, hence a = 148.
Then:
[tex]P = \frac{148}{1600} \times 100\% = 9.25\%[/tex]
The estimate of the percentage of millionaires in these cities is of 9.25%.
More can be learned about the percentage concept at https://brainly.com/question/10491646
