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Alexxx [7]
3 years ago
6

Listed below are pulse rates​ (beats per​ minute) from samples of adult males and females. Does there appear to be a difference

find the coefficient and variation for each of the two samples then compare the variation male: 87 68 61. 68 69 53 62 54 84 72 61 60 100 58 66 females: 65 81 82 70 74 86 87 84 88 89 94 71 86 80 78
The cofficient of variation for the males pulse rate ?
Mathematics
1 answer:
Sloan [31]3 years ago
8 0

Step-by-step explanation:

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A research team is testing whether a fuel aditive increases a car's gas mileage. The maker of the additive claims that the addit
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Answer:

Yes  there is sufficient evidence to  reject the company's evidence

Step-by-step explanation:

From the question we are told that  

   The sample size is  n =  25

    The mean is  \= x = 5.3 \ mpg

     The standard deviation is  \sigma = 1.8 \  mpg

    The z-score is  z = -1.94

The null hypothesis is  H_o : \mu = 6 \ mpg

The alternative hypothesis is  H_a :  \mu \ne 6

 Generally the p-value is mathematically evaluated as  

           p-value   =  2 * P( Z

From the z table  the area under the normal curve to the left corresponding to    -1.94  is

         P( Z

=>  p-value   =  2 * 0.02619

=>  p-value   =  0.052

Let assume the level of significance is  \alpha = 0.05

 Hence the  p-value > \alpha this mean that

   The  decision rule is  

Fail to reject the null hypothesis

The conclusion is

 There is sufficient evidence to  reject the company's evidence

 

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