You set up a hot chocolate stand out of football game the cost of your supplies and $75 you charge $.50 for each cup of hot choc
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Answer:
0.3811 = 38.11% probability that he weighs between 170 and 220 pounds.
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question, we have that:
Find the probability that he weighs between 170 and 220 pounds.
This is the pvalue of Z when X = 220 subtracted by the pvalue of Z when X = 170.
X = 220
has a pvalue of 0.6554
X = 170
has a pvalue of 0.2743
0.6554 - 0.2743 = 0.3811
0.3811 = 38.11% probability that he weighs between 170 and 220 pounds.
For this case we have to define the order of algebraic operations, that the division and multiplication must be done before (from left to right) that the addition and subtraction.
Then, given the following expression:
m = 10-6÷7-8.5
We have to:
So, we have:
We must bear in mind that equal signs are added and the same sign is placed, while different signs are subtracted and the sign of the major is placed.
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