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anonymous
 5 years ago
test
anonymous
 5 years ago
test

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0was able to paste my question in my last question, sorry for spam

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'm not sure I need midpoints here but I believe I do. This is a statistics problem about finding expectation value and standard deviation from a frequency distribution. The distribution is a range of ages. Starting at Under 13, next to 1314, and continuing onwards 1519, 2024, etc. up until 6064 and Over 65. The Age groups are for # of AIDS cases. For ex Under 13 has 9112 AIDS cases.  Don't I need an Upper Class Limit/Boundary for 65? Or am I thinking too deeply into this? THE QUESTIONS ARE: Is this a normal distribution, why? and Find the standard deviation and expectation value from the frequency distribution. Also, if an age is selected at random, what is the probability it is between 22 and 47? Chart below: AGE  AIDS CASES 0012  9112 1314  1065 1519  5289 2024  34795 2529  114141 3034  193926 3539  208505 4044  164697 4549  102732 5054  56950 5559  30424 6064  16493 65+  14503 Any help reminding me how this is put together and organized would be appreciated. This is for Final Review and I haven't done this since the beginning of the semester so I forgot most of it.
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