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lakkis [162]
3 years ago
9

What is the constant of proportionality in the equation y = 5/4

Mathematics
1 answer:
Slav-nsk [51]3 years ago
3 0

okay but yes whengoStep-by-step explanation

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A manufacturer of running shoes knows that the average lifetime for a particular model of shoes is 15 months. Someone in the res
AveGali [126]

Answer:

The decision rule is  

Fail to reject the null hypothesis

 The conclusion is  

There is no sufficient evidence to show that  the  designer's claim of a better shoe is supported by the trial results.

Step-by-step explanation:

From the question we are told that

  The population mean is  \mu = 15 \ months

   The sample size is  n =  25

   The sample mean is  \= x  = 17 \ months

   The standard deviation is  s = 5.5 \ months

Let assume the level of significance of this test is  \alpha  = 0.05

    The null hypothesis is  H_o :  \mu = 15

     The alternative hypothesis is  H_a : \mu  > 17

Generally the degree of freedom is mathematically represented as  

         df = n -1

=>       df = 25 -1

=>       df = 24

Generally the test statistics is mathematically represented as

        t = \frac{\= x- \mu }{\frac{s}{\sqrt{n} } }

=>   t = \frac{ 17 - 15 }{\frac{5.5}{\sqrt{25} } }

=>   t =  1.8182

Generally from the student t distribution table the probability of obtaining   t =  1.8182 to the right of the curve at a degree of freedom of df = 24  is  

    p-value  = P(t > 0.18182 ) = 0.4286

From the value obtained we see that  p-value > \alpha hence

The decision rule is  

Fail to reject the null hypothesis

 The conclusion is  

There is no sufficient evidence to show that  the  designer's claim of a better shoe is  supported by the trial results.

7 0
2 years ago
Factorise 3x^2-22x+7
Svet_ta [14]

Answer:

(3x+7)(x+5)

Step-by-step explanation:

i think lol

3 0
3 years ago
d varies inversely as c and the constant of variation is 4 which equation represents the relationshiop
weeeeeb [17]

Answer:

d = 4/c.

Step-by-step explanation:

Inverse variation is :  d = k/c where k is a constant.

Here k = 4.

6 0
2 years ago
Show why (2×3×7)^4 = 2^4 × 3^4 × 7^4 show work
Archy [21]
I’m sorry really…. Need points
3 0
3 years ago
Read 2 more answers
Evaluate f(0)<br> f(x) = - 4x + 9
german
F(0)= -4(0)+9
F(0)= 0+9
F(0)=9
4 0
2 years ago
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