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Lubov Fominskaja [6]
2 years ago
11

One lap around a parking lot is 3/10 mile. This represents 15% of the total distance Gregory ran.

Mathematics
1 answer:
frutty [35]2 years ago
6 0
We represent the total distance that Gregory ran by x such that 15% of the distance traveled by Gregory is 3/10 mile. Mathematically,
                                  (0.15)(x) = 3/10
The value of x from the equation is 2. Thus, the answer to this item is 2 miles. 
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Vadim26 [7]

Answer:

The 99% confidence interval is   165.776  <  \mu <  180.224  

Step-by-step explanation:

From the question we are told that

     The sample size is  n  = 100

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      The population standard deviation is  \sigma =  28 \ days  

From the question we are told the confidence level is  99% , hence the level of significance is    

      \alpha = (100 - 99 ) \%

=>   \alpha = 0.01

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } = 2.58

Generally the margin of error is mathematically represented as  

      E = Z_{\frac{\alpha }{2} } *  \frac{\sigma }{\sqrt{n} }

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Generally 95% confidence interval is mathematically represented as  

      \= x -E <  \mu <  \=x  +E

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=>     165.776  <  \mu < 180.224  

     

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Answer:

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Step-by-step explanation:


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