HP Prime  Statistics

08222014, 01:19 PM
Post: #4




RE: HP Prime  Statistics
To clarify for Walter whose answer was about as useless as any i have ever seen as it did not answer the question. I will rephrase the question to better explain what i need help with.
Background: I have a new calculator that I am trying to learn to use. It is an HP Prime. The manual sucks and makes it hard to find anything of use, and on calculator documentation is a joke. In the manual, if i don't already know the name of a function, good luck finding it. Current Situation: I have to use this calculator on a test of which statistics is a very small portion of the material covered. The test has limited time, and I am trying to figure out how to use the Prime to answer certain questions QUICKLY. I forgot to mention that I was referring to a Normal Distribution but my understanding was that ZScores are also sometimes referred to as standard scores and are always part of a normal distribution (not sure this is correct, but that is why i didn't spell out that it was a normal distribution) So, how do i calculate the area under the curve (yes, the normal distribution curve) between two values of Z. Yes, if i had a definition of the function f(x) = ?? then I could try to integrate, but my memory tells me that was a very time consuming and difficult option and leads to nothing useful for this task. Yes, I could look up values in a table, but no table will be provided. Yes, I could memorize certain values like .683 being between + std. deviation and estimate, but that is pointless. So what am i left with? Oh, using the calculator to calculate it.....silly me, why didn't I think of that? There is a function in the HPPrime called normald_cdf(mean, std dev, value) which calculates the area under the curve to the left of the value specified. So, back to my original question, is there a faster/better way to calculate the area between two values for this distribution? I could do normald_cdf(mean, std dev, upper_value)  normald_cdf(mean, std dev, lower_value) but that takes forever to enter, so without asking for more condescending, useless answers, is there a way to use the HP Prime to do this faster? For reference, on the TI calculators a function exists that takes an additional argument so i can specify the upper and lower bound of the region i want to calculate the area for, i am looking for something like this in the Prime. Thanks in advance. PS  this test has nothing to do with my company, but thanks for assuming. 

« Next Oldest  Next Newest »

Messages In This Thread 
HP Prime  Statistics  paul.hermans@benemtech.com  08222014, 04:00 AM
RE: HP Prime  Statistics  walter b  08222014, 05:42 AM
RE: HP Prime  Statistics  walter b  08222014, 05:52 AM
RE: HP Prime  Statistics  paul.hermans@benemtech.com  08222014 01:19 PM
RE: HP Prime  Statistics  David Hayden  08222014, 08:26 PM
RE: HP Prime  Statistics  Tim Wessman  08222014, 03:39 PM
RE: HP Prime  Statistics  paul.hermans@benemtech.com  08222014, 10:12 PM
RE: HP Prime  Statistics  Bill Zimmerly  08232014, 05:27 AM
RE: HP Prime  Statistics  aurelio  08232014, 02:48 PM
RE: HP Prime  Statistics  Angus  08232014, 09:39 AM
RE: HP Prime  Statistics  CR Haeger  08232014, 10:34 AM
RE: HP Prime  Statistics  parisse  08232014, 12:04 PM
RE: HP Prime  Statistics  paul.hermans@benemtech.com  08232014, 01:33 PM
RE: HP Prime  Statistics  parisse  08232014, 02:45 PM
RE: HP Prime  Statistics  StephanP  04272015, 02:37 PM

User(s) browsing this thread: 1 Guest(s)