People are randomly chosen from a group of 7 boys and 5 girls. Determine which scenario is more likely to happen.
1 answer:
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Answer:
<h2>9) Multiplication</h2><h2>10) </h2><h2>Step-by-step explanation:
<h2>This might be helpful and believe me dude, these questions are the most important questions for your exams.</h2><h2 /><h2>Keep Studying ☺️❤️</h2>Answer:
And we can find this probability using the complement rule and the normal standard table or excel:
The firgure attached illustrate the problem
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the retirement savings of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the complement rule and the normal standard table or excel:
The firgure attached illustrate the problem
