# Solver: Confidence Intervals

May 7, 2009

Does Solver provide confidence intervals around its parameter estimates?

## Display Mean And Confidence Intervals On Bell Curve

Nov 26, 2013

I've managed to figure out how to normalize my data and create several bell curves. However, these charts do not display the mean, std deviation, or confidence intervals. Any way to add these into my charts?

## Confidence Interval Calculation For Weibull Distribution

May 9, 2003

Confidence level calculation.

Background Info: I am doing a weibull analysis on failure data. Some of the data is right censored. I have already run a maximum likelihood estimate to obtain the estimated weibull parameters with Excel's SOLVER function. I am good on this part.

Now I want to calculate these parameters with a 95% confidence interval. I can't seem to find information on calculating confidence intervals with right censored data.

## Multiple Solver Constraints In Solver

Sep 10, 2006

I have a cell, D5, which is the sum of three other cells, A5 B5 and C5. (all currently empty). Cells A1 through C4 are filled with various numbers.

What I've been trying to do is use solver to say: Make D5 equal 200, do it by manipulating only A5 B5 and C5, and make it subject to the constraint that A5 must equal a value selected from A1:A4, and B5 must equal a value from B1:B4, and C5 ...etc. I have deliberately set it up so that there is only one solution.

I was doing fine until trying to create the constraints. How can I make a constraint that says "this cell" must equal "one of the following cells"? And if I can't do that, is there an alternate method of achieving the same result?

## Solver Solver To Calculate Through VBA

Jan 12, 2007

I have to use use the solver to calculate something (a mean-variance framework).

I am using the solver to minimize a cartain cell (variance) by making two cells equal through (expected return) by varying 10 cells( weights of assets), but I have to repeat this for 500+ times (for different expected returns).

Someone told me that I could best use some sort of loop through VBA. But I don't have a clue how that works.

## Solver- When Solver "changes Cells"

Jan 21, 2009

I want to use solver program. But when solver "changes cells" i want it to trigger my pivot tables in the workbook. So i added the code to my worksheet:

Private Sub Worksheet_Change(ByVal Target As Range)

ThisWorkbook.RefreshAll

End Sub

So when a change occurs, all my pivot tables will get refreshed and my data will change. Is solver able to trigger this event while solving an optimization problem?

## Transpose One Row With Intervals

Mar 21, 2009

I am trying to write a macro for transposing one row into multiple columns where the starting point for each column will be 15 cells starting from B4. I want to replicate the transpose for 200 rows.

## Change The Intervals

Jul 9, 2008

How do i change my data file from 1' intervals to 5' intervals?

The way it is now The way I need it
8300 8300
8301 8305
8302 8310
8303
8304
8305
8306
8307
8308
8309
8310
thru 11,000

## Getting Date At Specified Intervals?

Feb 12, 2013

My sheet consists of the following Data in the table ( to be increased to 99 rows or events )

I need to find the Next Date Occurence till the End_date

Next_Date1 = Start_date + Interval
Next_Date2 = Next_date1 + Interval

and so on till Next_Datexx is greater than End_date

I need a VBA code to fill the adjacent columns ie Next_date1 to Next_Date99 ( till the end_date), only if the Status is "DONE". If the Status is blank then the relevant colums must not fill.

I can do it with formulas, but need the VBA code.

Also the number of rows can be increased to 99 rows

Event
Start_date
End_date
Interval

[Code].....

## Histogram: Intervals Below Bar

Oct 5, 2006

I'm trying to make a histogram with the data analysis tool. The problem is that whenever I make a chart it doesnt show my intervals correctly. It puts them under the bars instead of between them.

## Histogram Intervals

Oct 6, 2006

I'm making use of a histogram to visualize my data. The only problem is that 90% of the data has a value which lies close to eachother but 10% is very different.

For example:

Interval-----Frequency
0-10------5
10-20-----7
20-30-----6
30-40-----0
40-50-----0
50-60-----0
60-70-----0
70-80-----0
80-90-----0
90-100----0
100-110---2

Now the histogram I will obtain won't look very good. Is there a way I can have an interval like 40 - ... which resembles everything above 40?

## Sum Times During Multiple Intervals?

Mar 18, 2014

I'm trying to determine how much time our agents are spending for their lunch/breaks during 30 minute intervals. Range A8:A200 lists the agent's names, Range B8:B200 lists their lunch/break start times, Range C8:C200 lists their lunch/break end times, and Column E lists the times (8:00, 8:30, 9:00, etc.). If an agent starts their break at 10:57 (Column B) and ends at 11:10 (Column C), the value next to 10:30 (Column E) would have 0:03:00 and the value next to 11:00 would have 0:10:00. But would need to sum all the agents which took a break/lunch between 10:30-11:00, and 11:00-11:30.

## Identify All Consecutive Intervals

Sep 18, 2013

Is there a formula that can identify all the consecutive intervals that have value below 90%.

## VBA To Clear Contents At Specified Intervals

Mar 6, 2014

I think I've had enough of using excel generated macro's as an excuse for decent code. I need to turn this:

Small procedure, function, what have you that will continue this pattern until I hit some kind of indicator to tell it to stop. This just clears the contents from 7 rows, hops down 9 rows and does it again.

## Rearranging Columns With Intervals

Aug 16, 2009

I have posted earlier thread on similar problem but i did not get much response.I am really having a tough time to record a macro, where my columns will be selected with an interval and then will be pasted in to another sheet....

## Averages With Jumping Intervals?

Jul 18, 2013

I would like to write a formula to average cells F27 - F11007 in a spreadsheet for every 96 values. That is, I want the average of F27:F122, F123:F218, F219:F314 and so on up to F10912:F11007. Ideally I would be able to pull down the fill handle and perpetuate the formula since this is a lot of data.

I've been trying to use INDIRECT and OFFSET formulas but I get a #REF! or #VALUE error.

## Getting A Macro To Run On Time Intervals

Dec 7, 2007

Below is the code i want to be run evey 2 minutes Thanks
Sub WebData()

Dim wSU As Worksheet
Dim wSR As Worksheet
Dim wSS As Worksheet

Dim iForRow As Integer
Dim iLastRow As Integer
Dim sURL As String

## 1/2 Hour Intervals To 15 Minutes

Sep 26, 2008

08:00 26calls
12:00 50calls
16:30 16calls

The problem is the data is output as above just outputing intervals with data.

I need to convert this data to 15 minute intervals as below:

08:00 13calls
08:15 13calls
12:00 25calls
12:30 25calls
16:30 8calls
16:45 8calls

## Find Out How Many Observations Are In Those Intervals

Aug 9, 2009

I have a range, intervals and need to find out how many observations are in those intervals...

RANGEINTERVALFREQUENCE-0.10773-0.10773-0.11 ?-0.10144-0.11 -0.05 -0.0983-0.05 0.01 -0.085110.01 0.07 -0.0810.07 0.13 -0.078760.13 0.19 -0.07580.19 0.25 -0.071360.25 0.31 -0.070750.31 0.37 -0.06930.37 0.43 -0.068420.43 0.49 -0.068060.49 0.55 -0.067390.55 0.61 -0.060030.61 0.67 -0.059350.67 0.73 -0.057470.73 0.79 -0.05290.79 0.85 -0.052570.85 0.91 -0.05190.91 0.97 -0.051340.97 1.03 -0.050011.03 1.09 -0.048051.09 1.15 -0.046941.15 1.21 -0.046411.21 1.27 -0.045311.27 1.33 -0.045291.33 1.39 -0.045061.39 1.45 -0.045021.45 1.51 -0.044341.51 1.57 -0.043321.57 1.63 -0.042231.63 1.69 -0.041661.69 1.75 -0.041441.75 1.81 -0.040051.81 1.87 -0.038661.87 1.93 -0.038561.93 1.99 -0.037811.99 2.05 -0.037112.05 2.11 -0.036272.11 2.17 -0.033292.17 2.23 -0.032872.23 2.29 -0.032672.29 2.35 -0.031322.35 2.41 -0.029372.41 2.47 -0.029262.47 2.53 -0.028292.53 2.59 -0.028222.59 2.65

## Sum Data For Time Intervals

Oct 10, 2009

I am trying to do is calculate (sum) results data for time intervals. For example, between 0500-0559hrs then 0600-0659hrs and so on. Data is collected at 1 minute intervals and may have a result of 0 or anywhere up to 30.

Column A has all time data e.g. 0500,0501,0502 etc
Column B has sum of instances e.g. 0,1,2,3 etc

## Creating 15 Min Intervals From Data

May 4, 2007

I want to create 15 minute time intervals from the data. I attached the file for reference. I would like to sum the data column that corresponds to each interval. I created an example using the formulas and I want to be able to do that automatically either using VBA or the formulas.

## Repeat Text At Specified Intervals

Aug 26, 2007

I want to set something up so the following text, is repeated at set intervals down the sheet, a number of times defined by an integer input box at the top of the sheet. Next to each new text array, I'd like to define a dynamic name range, calling each an increment above the one before. So:

Question Title
Question no.
Assessment Target
Level
No. of Marks

With name ranges being, (for e.g.) P1QT, P2QT, P3QT. For three sets of papers for the "Question Title" range.

## Run Solver With VBA

Feb 14, 2008

I am trying to drive Solver in Excel 2000 with a Visual Basic (version given as 9969) macro. SolverReset is observed, and SolverAdd puts the constraints in. But the SolverOK statement does nothing, so the SetCell and the ByChange windows stay empty.

SolverSolve is trying to do something, because the spreadsheet cell that should receive the return code from Solver gets an error value #VALUE! (The macro then stops, unable to process this entry.)

Solver is checked off ok in the References list in V.Basic.

The same macro, same spreadsheet, in the same Excel file, works fine on the other computer in my office with what I am told is a more recent version of Excel; i.e. this doesn't look like a coding error.

## Countifs Date And Time Intervals?

May 26, 2014

Count the number of occurences on 1 day within a 60 minute timeframe. data includes dates and times

## Transposing From Horizontal To Vertical With Intervals

Jan 9, 2014

I've been working on this for days, i still got no solution on what formulas I will put on cells in "To" tab. The excel file is composed of two tabs "To" and "From". We will convert the "From Tab" to "To" format. What formula will I put in D3 to V3 and drag down in "To" tab to convert datas from "From" tab.

## Chart Axis Date Intervals

Feb 20, 2009

I'm using Excel 2007 and I want to plot data vs dates. Furthermore I want the dates on the dates axis to increment by month not by a certain number of days. So something like this:

1-Jan-09
1-Feb-09
1-Mar-09
...

There's the Major/Minor Units on the Axis Options screen but I cannot type in a constant number since the number of days for each month is different.

May 12, 2009

I have been given the task of finding out who logs in at what time of the day.

I have attached the raw data that I have to work with.

In essence I need to see how many login's there were for 06.00 - 10.00 at 15 minute intervals e.g:

etc

Has anyone got any suggestions?

## Returning A Value If The Time Falls Between Two Intervals

Nov 7, 2009

I'm the Held desk manager . I'll have my folks logging in every time interval and work for 9hrs. Now I wanted to see at any given point a day the number of folks I have on my desk .

I have created table " A " and I'm looking for a formulae so that I get my data like table " B " .

To give more insight about table '" B " - During 00:00 - 00:30 , I'll have 41 people slowly goes down as people log off..

## Sorting Data To 15 Minute Intervals?

Jan 11, 2014

In the attached excel file I'd like to use data that was polled every 15 minutes. i.e 00:15, 00:30, 00:45, etc. Can I do this without having to manually delete all the nonrequired data per each row?

Also I have many files of such data that and would like to combine the all them into one to represent data for the whole year polled at every 15 minutes.

## Excel - Write A Certain Word With Intervals

May 15, 2014

I have to write the word "hyllvagn" in column A in every fifth row starting with \$A\$2.

The range should be \$A\$2:\$A\$100.