Excel Statistics 67: Uniform Probability Distributions

To anyone that will listen...I need serious help with excel and graphing. I
am taking statistics, and our instructor wants us to graph normal probability
distributions. I seem to be typing in the wrong information, although I am
not sure how. My book isn't very clear on how to do it, and neither do the
excel tutorials. I need this explained in PLAIN ENGLISH, as I am not overly
familiar with "computer lingo". The problem is: standard deviation=4.7,
mean=21.7 x is numbers 1-10, y is (in order) 25, 19, 17, 15, 20, 24, 30, 19,
16, 23. Please tell me what to type and where to put it in. (I have gotten
as far as going to fx, then "statistical", then NORMDIST. WHAT THEN???
Thank you!

Dear collegues.

I try to find a way to visualize some probability distributions, looking like this:

(example)
Code:

    >4 %:  

  0  

this distribution is, let s say, available for every month. i want to show that distribution over history, so i want to create something like this: http://www.graphicinvestor.com/econo...art_200608.gif

by now, i calculated the quartiles (25, 50 and 75%), but now i do not really how to continue to get where i want to.

anyone has an idea / hint how to continue?
any help would be great! I guess it s more a statistical problem...

How would I produce a distribution of, for example, students by their class:
Freshman 4
Sophomore 3
Junior 7
Senior 9

This can be either a formula or an algorithm.

Also, assuming that a freshman has completed 0 semesters, a sophomore 2, a junior 4 and a senior 6, how would I computer the average number of semesters that students on the list have completed? Basically, I guess I need to assign these numbers to the categories, but I don't know how to do that.

Hi,
I have two issues with EXCEL2007:
1. How to generate a uniformly sampled data sheet from following example table:
X Y
12.4 51
42.4 77
87.5 92.8
117.4 104.6
132.4 109.8
162.5 122.4
192.3 133.2
222.5 142
252.5 152.2
I need to have a table with column having data every 50 units or every 100units. For example using moving average trend line etc or through any other method.
2. In the scatter plot I want to annotate the samples with the labels a, b, c, d etc for the following table:
Label X Y
a 12.4 51
b 42.4 77
c 87.5 92.8
d 117.4 104.6
e 132.4 109.8
f 162.5 122.4
g 192.3 133.2
h 222.5 142
i 252.5 152.2

Any help highly appreciated.

Regards,

Rao

Say you have a table (5x5, for argument's sake)-- along the top is
demand from customer A, on the bottom is demand for customer B. Say the
legend for both the rows and the columns is (0,1,2,3,4), and in the
table itself is the corresponding probability for each pair.

In other words, if you want to see the probability that demand from
both customers was zero, you'd look in the upper left corner of the
array. If you wanted to see the probability that customer A demanded 2,
and customer B demanded 3, you'd go down 3, and over 4 (remember that
0,0 is upper left, not 1,1).

Without using a macro, or manually writing out sum commands, is there a
way to create a total probability distribution table from the table I
have given you? In other words, we know that minimum demand is 0, and
that sum is given by the upper left cell, but the probability that the
total demand is 3 is the sum of cells (0,3), (1,2), (2,1), and (3,0).
The table in this example would be 9 wide, with the probability of 0 on
the left, and 8 on the right.

Perhaps there's a way to match a VLOOKUP, and HLOOKUP, and a few IFs,
maybe, but if anyone can suggest a more automated way or a clean
syntax, I'd be grateful.

Thanks!

hiya all i was wndering if anyone could help me i need to work the probability of number using a percentage for expample 50 sales has a probability of occuring 40% and 60 sales has probability of occuring 5% and so on, can any explain how i need to do this im new to excel ,
thank u

I have a pack of cards and already drawn some cards.

I have 40 cards left: 12 diamonds, 11 hearts, 10 spades and 7 clubs.

The probability of the next 3 cards being (in order) a diamond followed by a club then another diamond is (12/40)*(7/39) * (11/38).

The answer is 1.5587%. What formula should I or could I use to get this result? I'd imagine it would be a nested formula that's not going to be easy to decipher!!

My problems I'm encountering when trying to get Excel to work out the probability for me without me having to hard-wire the figures in to the formula:

The cards are not being replaced, so when a diamond is drawn out, there is one less diamond in the pack to take into consideration when looking for another diamond. It's easy when, say, there are the same number of each suit left remaining but this is not the case!!

I can see a long-haul solution would be to list every possibility then lookup the desired combination but time/speed/hassle.... there's another easier way, isn't there?

Hello all. First post here and I'm looking for a little bit of help .

I've started on a project for a Prob & Stat class I have and I'm stuck trying to figure out how to display a lognormal probability distribution on a Histogram.

In the attached .xlsx on sheet "C1 HIST" you can see the random variable seeds, the loginv to get the full numbers (column C), the BIN I used for the histogram, and my attempt at the "lognormaldist" values. On sheet 3 you an see the actual commands I used to generate the numbers. I don't think I'm using the "lognormaldist" properly because the values in Column E of "C1 HIST" keep going up instead of spiking up quickly and then coming back down.

Toward the bottom of this sheet you can see what an add-in called "EasyFitXL" shows the lognormal distribution to be, but I'd like to know how to do it without an add-in.

I also attached the project statement (I'm trying to do the probability distribution part of step 2 of "Progress Report 1". Right now I'm just trying to figure out everything for Random Variable C1, and once that's done, the rest will be easy. You can also see the distribution type, CV, and Mean on the table in the .pdf (seen at the upper right of sheet "C1 HIST").

If you guys have any help/input it's be greatly, greatly appreciated.

Thanks so much!

Hi all, my first post so i hope you can help!

I have some data for quotes a company has been sent, with a number of variables, for example qty of items requested, value of quote, length of time it took to return quote etc... And finally a yes or a no column as to whether the business was won.

What i want to do, but i'm having touble getting head around how, is produce some sort of table of probability for success of a quote.

For example, if a quote comes in for 50 items, and we return the price within 20 days, what is out chance of winning the bid?

Any ideas, do i need multiple tables for each variable with a yes or no against each, then compare these, or is there some fancy statiscal test i can do?

Any ideas?

Thanks,

I have a data set based on an uneven distribution of cards in a 60 card deck, each with a value ranging from 0-5.

I need to build a probability distribution of all the random samples of 10. So, how many random sets of 10. have an average value of 1 (or a total of 10) etc.

Then, I need to build a variable distribution so that it changes as I change the sample size. So, with a sample of 20 cards, what does the distribution look like?

Can this be done in excel? Should I post what I have now to work with?