Mathematics: (co 5) an advocacy group claims that the mean braking distance of a certain type of tire is 75 feet when the car is going 40 miles per hour. in a test of 45 of these tires, the braking distance has a mean of 78 and a population standard deviation of 5.9 feet. find the standardized test statistic and the corresponding p-value. group of answer choices

(co 5) an advocacy group claims that the mean braking

dre4232

08.01.2022

z=0.5084

p=0.2809

Step-by-step explanation:

Since number of tires tested for breaking distance is enough (>30), the standardized test statistic is calculated by the formula:

z= $\frac{X-M}{\frac{s}{\sqrt{N} }} }$ where

X is the mean breaking distance in the sample (78)M is the mean breaking distance (75)s is the standard deviation (5.9)N is the sample size

Putting the numbers in the formula:

z= $\frac{78-75}{\frac{5.9}{\sqrt{N} }} }$ =0.5084 and corresponding p value is:

p=0.28

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nina1390

07.11.2021

step-by-step explanation:

first, we combine like terms. 2x-5+x+y-3 = 3x-y-8

you can't simplify further, therefore it cannot be factored.

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