{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

SCAN0005 - What is the 95 CL for the lifetime of a light...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: What is the 95% CL for the lifetime of a light bulb? We cannot measure true pop. mean u or pop. deviation 6 We determine sample meanYand sample dev. SX CI expression says “true mean u is likely to lie in certain distance from measured mean? Y: 845.2 hrs SX = 94.2 hrs, n=60 and n=1000 3x = 47.1‘ hrs, n=1ooo Using Statistics to Compare Data - Q test for bad data - F test for oomparable 8 between data sets - T test to compare a data set — vs. a known standard — vs, another data set — vs. another method Case 1. T-test to compare a data set to a known standard A mal sample was certified to contain 3.19 wt% sulfur. A new analytical methud. which you are testing. gives yuu 3.19.122, 3.30. and 3.23 wt% sulfur‘ Dues your analyxil agree with the certified results at 95% level «I confidence? IY—pl r l = cal S; " If tnil > tcm, then the result is different from the known value at the 95% level of confidence. The chance that you have made a mistake is < 5% ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern