Answered

Find expert answers and community support for all your questions on IDNLearn.com. Ask anything and receive prompt, well-informed answers from our community of experienced experts.

A random sample of 80 tires showed that the mean mileage per tire was 41,400mi, with a standard deviation of 4700mi

A Random Sample Of 80 Tires Showed That The Mean Mileage Per Tire Was 41400mi With A Standard Deviation Of 4700mi class=

Sagot :

Medunno13idn

Question 14

Part (a)

[tex]\frac{46800-41400}{4700} \approx \boxed{1.15}[/tex]

Part (b)

[tex]-2.57=\frac{x-41400}{4700} \\ \\ -2.57(4700)=x-41400 \\ \\ x=41400-2.57(4700) \\ \\ x \approx \boxed{29300}[/tex]

Thank you for using this platform to share and learn. Keep asking and answering. We appreciate every contribution you make. Thank you for choosing IDNLearn.com. We’re dedicated to providing clear answers, so visit us again for more solutions.