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FrozenT [24]
2 years ago
7

Please please help!!!!

Mathematics
1 answer:
I am Lyosha [343]2 years ago
4 0

Answer:

4.75

Step-by-step explanation:

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A random sample of 20 purchases showed the sample mean of $48.77 and the sample standard deviation s is $17.58. How large is the
laila [671]

Answer:

<h2>$5.03</h2>

Step-by-step explanation:

Given data          

Sample Mean (M):  $48.77  

Sample Size (n): 20

Standard Deviation (σ) :  $17.58

Confidence Level: 80%

 we know that z*-Values for 80% Confidence  Levels is 1.28

the expression for margin of error is given bellow\

MOE= z*σ/√n

We can now substitute into the expression and solve for the MOE as

MOE= 1.28*17.58/√20

MOE= 22.502/4.47

MOE= 22.502/4.47

MOE= 5.03

The margin of error for a 80 % confidence interval is $5.03

3 0
3 years ago
What is the measure of x?
bogdanovich [222]

Answer:

22

Step-by-step explanation:

This is a right angle so the sum of those would be equal to 90 degrees

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4x = 88 divide both sides by 4

x = 22

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3 years ago
Solve for x in the equation x2 - 4x-9= 29.
alukav5142 [94]

Answer:

I think the first one

Step-by-step explanation:

7 0
3 years ago
Write a real world situation that would representby the system y=3x +20 and y=5x + 10
ryzh [129]
There are 2 car rental companies
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Round 62,322,118,987 . Write the result as the product of a single digit and a power of 10.
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Answer:

6.2 x 10^10

Step-by-step explanation:

5 0
3 years ago
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