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CoolRahim9090
02.12.2019 •
Mathematics
Y-2=-(x+7) rewrite in standard form
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Ответ:
x + y = -5
Step-by-step explanation:
standard form is ax + by = c
equation is y - 2 = -x - 7
Add x to both sides.
x + y - 2 = -7
Now add 2 to both sides.
x + y = -5
Ответ:
a)![Z = 2.57](/tpl/images/0526/2000/058ce.png)
This country emmits 2.57 standard deviations above the mean of the emissions of the countries of this group of nations.
b)![Z = -3.1](/tpl/images/0526/2000/80419.png)
This country emmits 3.1 standard deviations below the mean of the emissions of the countries of this group of nations.
c)![Z = 0.19](/tpl/images/0526/2000/7be3c.png)
This country emmits 0.19 standard deviations above the mean of the emissions of the countries of this group of nations.
Step-by-step explanation:
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 problem, we have that:
a. One country's observation was 14.1. Find its z-score and interpret.
Here we have![X = 14.1](/tpl/images/0526/2000/ed2ad.png)
This country emmits 2.57 standard deviations above the mean of the emissions of the countries of this group of nations.
b. Another country's observation was 2.2. Find its z-score and interpret.
Here we have![X = 2.2](/tpl/images/0526/2000/39607.png)
This country emmits 3.1 standard deviations below the mean of the emissions of the countries of this group of nations.
c. A third country's observation was 9.1. Find its z-score and interpret.
Here we have![X = 9.1](/tpl/images/0526/2000/bc496.png)
This country emmits 0.19 standard deviations above the mean of the emissions of the countries of this group of nations.