402 students were surveyed about their preferences of sports. 113 students like football, 146 students like baseball, and 42 stu
1 answer:
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First we have to find how much water leaked
5galllons-3 gallons=2 galllos of water leaked
Now we know
Finally we can simplify it
- its the answer
5galllons-3 gallons=2 galllos of water leaked
Now we know
Finally we can simplify it
Answer:
And we can find this probability with the complement rule:
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 average homicide rate for the cities 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 with the complement rule: