(1/4+1/4)-6÷1/3+2 how do you get it?????
2 answers:
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Answer:
Step-by-step explanation:
1) 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".
Let X the random variable that represent the scores, and for this case we know the distribution for X is given by:
And let represent the sample mean, the distribution for the sample mean is given by:
On this case
2) Calculate the probability
We want this probability:
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:
<h2>PROBLEM SOLVING</h2>
- Each bag of pretzels contain = 0.5 oz
64 x 0.5 oz = 32 oz
Therefore, 64 bags of pretzels contains <u>32 oz</u> of pretzels.