z-score of a company is 5.
What is z- test?
A z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.
The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard deviation of $4,000.
Now, using z- score
z= (x-)/
z= 54000- 34000/ 4000
z= 20000/4000
z=5.
Hence, z-score of a company is 5.
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Two transformations that can be used to show that polygon ABCDE is congruent to polygon GFJIH : <u>rotation -90° and translation (0,2)</u>
<h3>Further explanation</h3>There are several forms of transformation, including translation, dilation, rotation or reflection
There are 2 shapes of geometry:
Similar figures:
the same shape but different in size,
Congruent figures:
the same size and the same shape
Both polygons will appear congruent if, after being transformed, the two polygons will map exactly to each other
A sequence of two transformations e can do is :
1. rotation -90°
Let point H(4,1) from polygon GFJIH , we rotate -90°
2. translation (0,2)
Keywords: transformation, translation, rotation
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