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Olenka [21]
2 years ago
10

A box of 15 cookies costs $9. What is the cost for 1 cookie? $_____

Mathematics
2 answers:
777dan777 [17]2 years ago
8 0

Answer:

.6

Step-by-step explanation:

9÷15 = 0.6

mel-nik [20]2 years ago
6 0

Answer:

15 box of cookies =$9

1 box of cookie = $9/15=$0.6

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Complete Question

Pennsylvania Refining Company is studying the relationship between the pump price of gasoline and the number of gallons sold. For a sample of 14 stations last Tuesday, the correlation was 0.65.At the 0.01 significance level Can the company conclude that the correlation is positive

Answer:

Yes the company conclude that the correlation is positive

Step-by-step explanation:

From the question we are told that

   The  sample size is  n =  14

    The correlation is  r =  0.65

     

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The standard error is evaluated as

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The test statistics  is evaluated as

      t =  \frac{r }{SE}

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The p-value of of  t is obtained from the z table, the value is  

        p-value =  P(t <  3.654) =  0.00012909

Given that p-value  <  \alpha  then we reject the null hypothesis

           Hence the company can conclude that the correlation is positive

     

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