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Drupady [299]
2 years ago
13

A data set has a mean of 42 and a standard deviation of 7.8 if an element in the set is 54 find its z-score

Mathematics
1 answer:
ankoles [38]2 years ago
3 0

Answer:

<h3><u>The z-score is 1.54</u></h3>

Step-by-step explanation:

<h2>Given:</h2>

x = 54

μ = 42

σ = 7.8

<h2>Required:</h2>

Z-score

<h2>Equation:</h2>

Z\: =\: \frac{x\:-\:μ}{σ}

where: Z - standard score

x - value

μ - mean

σ - standard deviation

<h2>Solution:</h2>

Substitute the value of x, μ and σ

Z\: =\: \frac{x\:-\:μ}{σ}

Z\: =\: \frac{54\:-\:42}{7.8}

Z\: =\: 1.54

<h2>Final Answer:</h2><h3><u>The z-score is 1.54</u></h3>
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7 0
3 years ago
Brandon has 32 stamps. he wants to display the stamps in rows,with the same n
AleksandrR [38]
Okay, let's work this out...
What we know:
-32 stamps in all
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What we "want to know" :
- # of combinations (different)
Problem Solving :
This is actually very easy its just the words than get ya!
1st : we need to figure out the factors of 32...
In other words, we need to figure out _x_=32 and how many different combinations and ways there are!
Note:(* means multiplication)
#1: What are the factors of 32?
32: 1*32 , 2*16 , 4*8
32: 32*1 , 16*2 , 8*4
The factors (not including 1 are 2,4,8,16)
Now, as you can see, there are 4 ways to get 32 as shown first.
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That ¦ is 1 way with 16 in 2 rows. Basic multiplication, 16*2=32 or 16+16=32.
But, this is also a way,
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Now there should be 2 in each row and 16 rows. Again 2*16=32 or 2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2=32
That's two ways so far.
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Another way which is 4 rows with 8 in each.
4*8=32 or 8+8+8+8=32
But, this is also a way,
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Now that is 8 rows with 4 in each. 8*4=32 or 4+4+4+4+4+4+4+4=32
That was our fourth way.
Again NOT including 1. If you include 1 then there will be 6 ways but aside from that there are 4 ways.
I hope that helped I worked hard typing this all for you. Any questions just ask!
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the correct answer is 3249 sorry i took so long

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