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never [62]
3 years ago
10

Find the volume of a rectangle box 12cm by 15cm by 10cm

Mathematics
2 answers:
olga nikolaevna [1]3 years ago
5 0

Answer:

Step-by-step explanation:

natka813 [3]3 years ago
5 0

Answer:

Volume of the rectangular box=1800cm³

Step-by-step explanation:

Volume of the rectangular box = length x breadth x height

Volume of the rectangular box=12cm x 15cm x 10cm =1800cm³

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Travel time data is collected on an arterial. With 30 runs, an average travel time of 152 seconds is computed over the 2.0 miles
o-na [289]

Answer:

a

 The 95% confidence bounds is  145.80 <  \mu <   158.19

b

It was not necessary to make any assumption about the shape of the travel  time distribution

Step-by-step explanation:

From the question we are told that

 The sample size is  n =  30  

  The sample mean  is  \=x = 152

   The standard deviation is  \sigma =  17.3 \  second

From the question we are told the confidence level is  95% , hence the level of significance is    

      \alpha = (100 - 95 ) \%

=>   \alpha = 0.05

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

   Z_{\frac{\alpha }{2} } =  1.96

Generally the margin of error is mathematically represented as  

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

=>    E =  1.96 *  \frac{17.3 }{\sqrt{30} }

=>     E = 6.19  

Generally 95% confidence bounds  is mathematically represented as  

      \= x -E <  \mu <  \=x  +E

=>  152  -6.19 <  \mu <  152  -6.19

=> 145.80 <  \mu <   158.19

This 95% confidence bounds show that there is 95% confidence that the true mean lies within this bound hence there is it was not necessary to make any assumption about the shape of the travel  time distribution

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3 years ago
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