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3 years ago

Please explain how you got the answer. No links I will report you. Show your work.

Mathematics

2 answers:

solong [7]3 years ago

7 0

Answer = 6 since x - 1.5 = 4.5

tekilochka [14]3 years ago

4 0

Answer:

x = 6

Step-by-step explanation:

5 sides all the same length

s = 22.5/5

s = 4.5

--------------------

x - 1.5 = 4.5

Add 1.5 to both sides

x = 6

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3 years ago

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3 years ago

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3 years ago

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Harlamova29_29 [7]

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2 years ago

Mileage tests are conducted for a particular model of automobile. If a 98% confidence interval with a margin of error of 1 mile

Llana [10]

Answer: 37

Step-by-step explanation:

Given : Significance level : $\alpha:1-0.98=0.02$

Critical value : $z_{\alpha/2}=z_{0.01}=2.33$

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Population standard deviation: $\sigma=2.6$ miles per gallon.

We know that when the population standard deviation is known then the formula to find the sample size is given by :

$n=(\dfrac{z_{\alpha/2}\times \sigma}{E})^2$

$n=(\dfrac{(2.33)\times 2.6}{1})^2=36.699364\approx37$ [Round to the next whole number.]

Hence, the required number of automobiles should be used in the test = 37

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4 years ago