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  View Full Version : Normally Distributed Data w/ mean of 16, standard dev. of...
  
  Jen123
  04-27-2008, 03:49 PM
  Question: A set of data is normally distributed with a mean of 16 and a standard deviation of 0.3. What percent of the data is between 15.2 and 16?
  
  So far I got: I wrote the limits in terms of the mean: 16 - 0.8 = 15.2 and 16 - 0 = 16.
  Then I solved for t: t(0.3)= 0.8, t=2.67 which equals 99.3%.
  
  This was a test question I got it wrong but I'm not sure where I went wrong because I tried to follow the book and I continue to get the same answer.
  
  Subhotosh Khan
  04-27-2008, 03:53 PM
  Question: A set of data is normally distributed with a mean of 16 and a standard deviation of 0.3. What percent of the data is between 15.2 and 16?
  
  So far I got: I wrote the limits in terms of the mean: 16 - 0.8 = 15.2 and 16 - 0 = 16.
  Then I solved for t: t(0.3)= 0.8, t=2.67 which equals 99.3%.
  
  This was a test question I got it wrong but I'm not sure where I went wrong because I tried to follow the book and I continue to get the same answer.
  
  Look at z-distribution table:
  
  z\, = \, \frac {x\, - \, \mu}{\sigma}
  
  Jen123
  04-27-2008, 04:27 PM
  I looked in my book for a z distribution table and i could not find it could you explain yourself a little more and identify your variables please I'm confused.
  Thanks
  
  stapel
  04-27-2008, 04:36 PM
  Look at z-distribution table:
  
  z\, = \, \frac {x\, - \, \mu}{\sigma}
  I looked in my book for a z distribution table and i could not find it could you explain yourself a little more and identify your variables please
  How on earth is your statistics course discussing "distributions" and "normality", if it hasn't yet covered the concepts of (and variables for) "mean" and "deviation", and has no information on z-tables...? :shock:
  
  Eliz.
  
  Jen123
  04-28-2008, 12:07 AM
  I don't have a teacher, so I haven't discussed it with anyone. I just have a book and in the book it has nothing referring to a z table thats why I asked for further help. I still need the help of figuring out how to solve the problem the correct way, or could someone explain solving it with a z table.
  
  stapel
  04-28-2008, 07:18 AM
  I don't have a teacher.... I just have a book and in the book it has nothing referring to a z table.... could someone explain solving it with a z table.
  Unfortunately, we are not able to teach courses within this environment. Since the various lessons you've found online (to supplement your apparently quite odd book) have not been sufficiently helpful, it may be time to consider taking a class, or hiring a tutor, in order to obtain the hours of instruction you have requested.
  
  My best wishes to you in your studies! :D
  
  Eliz.
explanation: The document is a forum thread discussing a statistics problem. It contains a question about normally distributed data and attempts to solve it, as well as responses from other users providing guidance and asking for clarification. The original poster (Jen123) asks a specific math question and provides her attempt at solving it, but is unsure where she went wrong. Other users respond with hints and suggestions, but the thread does not contain a complete, verified answer to the original question.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: PDA
  
  View Full Version : Normally Distributed Data w/ mean of 16, standard dev. of...
  
  Jen123
  04-27-2008, 03:49 PM
  Question: A set of data is normally distributed with a mean of 16 and a standard deviation of 0.3. What percent of the data is between 15.2 and 16?
  
  So far I got: I wrote the limits in terms of the mean: 16 - 0.8 = 15.2 and 16 - 0 = 16.
  Then I solved for t: t(0.3)= 0.8, t=2.67 which equals 99.3%.
  
  This was a test question I got it wrong but I'm not sure where I went wrong because I tried to follow the book and I continue to get the same answer.
  
  Subhotosh Khan
  04-27-2008, 03:53 PM
  Question: A set of data is normally distributed with a mean of 16 and a standard deviation of 0.3. What percent of the data is between 15.2 and 16?
  
  So far I got: I wrote the limits in terms of the mean: 16 - 0.8 = 15.2 and 16 - 0 = 16.
  Then I solved for t: t(0.3)= 0.8, t=2.67 which equals 99.3%.
  
  This was a test question I got it wrong but I'm not sure where I went wrong because I tried to follow the book and I continue to get the same answer.
  
  Look at z-distribution table:
  
  z\, = \, \frac {x\, - \, \mu}{\sigma}
  
  Jen123
  04-27-2008, 04:27 PM
  I looked in my book for a z distribution table and i could not find it could you explain yourself a little more and identify your variables please I'm confused.
  Thanks
  
  stapel
  04-27-2008, 04:36 PM
  Look at z-distribution table:
  
  z\, = \, \frac {x\, - \, \mu}{\sigma}
  I looked in my book for a z distribution table and i could not find it could you explain yourself a little more and identify your variables please
  How on earth is your statistics course discussing "distributions" and "normality", if it hasn't yet covered the concepts of (and variables for) "mean" and "deviation", and has no information on z-tables...? :shock:
  
  Eliz.
  
  Jen123
  04-28-2008, 12:07 AM
  I don't have a teacher, so I haven't discussed it with anyone. I just have a book and in the book it has nothing referring to a z table thats why I asked for further help. I still need the help of figuring out how to solve the problem the correct way, or could someone explain solving it with a z table.
  
  stapel
  04-28-2008, 07:18 AM
  I don't have a teacher.... I just have a book and in the book it has nothing referring to a z table.... could someone explain solving it with a z table.
  Unfortunately, we are not able to teach courses within this environment. Since the various lessons you've found online (to supplement your apparently quite odd book) have not been sufficiently helpful, it may be time to consider taking a class, or hiring a tutor, in order to obtain the hours of instruction you have requested.
  
  My best wishes to you in your studies! :D
  
  Eliz.
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document is a forum thread discussing a statistics problem. It contains a question about normally distributed data and attempts to solve it, as well as responses from other users providing guidance and asking for clarification. The original poster (Jen123) asks a specific math question and provides her attempt at solving it, but is unsure where she went wrong. Other users respond with hints and suggestions, but the thread does not contain a complete, verified answer to the original question.
  
  Label: question