If the population standard deviation of the stopping distance is provided as σ = 6.7 feet. Estimate the average stopping distance of all Model A tires with a 94% confidence interval.

Complete Question

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The estimate of the average stopping distance of all model A tires with a 94% confidence interval is  

Step-by-step explanation:

From the question we see that

   The sample size is  n  = 8

   The population standard deviation is  

Generally the sample mean is mathematically represented as

=>    

=>    

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

=>  

Generally the degree of freedom is mathematically represented as

=>  

=>  

Because the n < 30  we will making use of the t table

Generally from the t distribution table the critical value  of   at a  degree of freedom of  is  

Generally the margin of error is mathematically represented as  

=>    

=>    

Generally 94% confidence interval is mathematically represented as  

=>        

=>        

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right