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wlad13 [49]
3 years ago
10

Help please for 50 points

Mathematics
2 answers:
Montano1993 [528]3 years ago
7 0

Answer and Step-by-step explanation:

347

Alisiya [41]3 years ago
3 0

Answer: 347.0

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

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3 years ago
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crimeas [40]

Answer x=30

Step-by-step explanation:

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In a survey 13 out of 20 teacher respond yes to a proposal for a new after school club in the same survey 37 out of 50!students
boyakko [2]

Answer:Yes

Step-by-step explanation:13 out of 20

8 0
3 years ago
The data represented by the graph is normally distributed and adheres to the 68-95-99.7 rule. The standard deviation of this dat
kirill [66]
The rule sometimes called the Empirical Rule, which means "based on observations" The graph is shown this way : (see attachment). This rule is represented by a<span><span>bout 68% of values fall within one standard deviation of the mean.</span>About 95% of the values fall within two standard deviations from the mean.<span>Almost all of the values — about 99.7% — fall within three standard deviations from the mean.</span></span>

4 0
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Please help asap its due today
storchak [24]

Answer:

$5.30

Step-by-step explanation:

Let me know if you need evidence!

4 0
3 years ago
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