math

No idea how to do this. I looked in my book and there usually is a data set present to get the first, second and third quartile.

The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 392 hours and a standard deviation of 9 hours. Find the first quartile Q1.



You are given a normal distribution. If you mean the upper quartile by Q1, then the upper 25 percent has to be found by statistical methods. I suspect you are supposed to be using your calculator or a chart with the given mean and std deviation. I get 396 for that upper quartile.

http://psych.colorado.edu/~mcclella/java/normal/accurateNormal.html

WELL I KNOW YOU SUPPOSE TO BE DEALING WITH MATH BUT AIN'T YOU SUPPOSE TO ASK A QUESTION?

  1. 👍 0
  2. 👎 0
  3. 👁 136
asked by J

Respond to this Question

First Name

Your Response

Similar Questions

  1. Language arts

    I am trying to assist my fourth grader in writing her first book report. It is based off of a mystery book. I have looked everywhere for a basic guildline for her so that I can give her an idea of what to do without doing it for

    asked by Robyn on October 20, 2008
  2. Chemistry

    i need some chemical properties of the element arsenic.i have looked online and havent found any i have also looked in my book.

    asked by Anonymous on November 7, 2013
  3. Science

    i need detailed chemical properties for the element arsenic. i looked on the websites online and i looked in my text book

    asked by Anonymous on November 7, 2013
  4. math

    Book 1 255 book 2 235 book 3 178 book 4 299 book 5 150 book 6 67 book 7 82 book 8 267 book 9 188 book 10 142 book 11 281 book 12 138 book 13 326 book 14 264 book 15 103 ^ number of pages What would be the best graph or display to

    asked by :I on April 30, 2017
  5. Chemistry

    For which of the following aqueous salts will electrolysis produce hydrogen gas and oxygen gas? Answered the hint in Mastering Chem & looked over the book and I still have no idea. Check all that apply: A) NiF_2(aq) B) NaF(aq) C)

    asked by Mike on November 8, 2012
  6. "write a paragraph on book's thesis"?

    I'm going into AP (advanced placement) European History, grade 10, and our summer reading assignment was to read a A World Lit Only By Fire, a book about the tenaissance. Along with this assignment, I'm required to write a

    asked by christine on August 31, 2005
  7. Biology 10

    If one lived in a hot country away from civilization, would it seem reasonable that water changes to a solid? What makes an occurrence reasonable? I already looked through Chapter 3 in my Biology book and the answer isn't even in

    asked by rose.marie on September 5, 2018
  8. Art

    What is an artwork source, because I don't know what to put in that field. Is it where I got the my idea from in my drawing, if so would a book where I got my idea be ok? Thank you

    asked by Anonymous on October 20, 2014
  9. algebra,help

    I am clueless about this one...can someone help me with it ...thanks Business and finance. The demand equation for a certain type of printer is given by D = -200p + 35,000 The supply equation is predicted to be S= -6p^2 + 400p –

    asked by jas20 on February 20, 2007
  10. Algebra

    How do you find the zeroes of the 1/2x^3-x? I factoried it so it would be 1/2x(x^2)-x. The one zero would then be zero, which matches with my book's answer. But I have no idea how my book got +/- the sq. root of two for the other

    asked by Anneliese on November 3, 2009
  11. Algebra

    Factor m^2-k^2+6k-9 ^2 means squared. I don't know any other way to type it. Thanks. Seems to me you can only do this in 2 pieces...factor the first 2, then the last 2... (m+k)(m-k) + 3(2k+3) Whadya think? hmmm... I looked in the

    asked by Kyle on October 9, 2006

More Similar Questions