#### Calculate average based on specific time or date

I have data of travel time between 2 locations each day. There are
columns such as date, start time and end time in multiple columns.

How can I find the average of travel time on Monday, Tuesday, Wed etc
and the average of travel time if start time is between 7:00 to 7:30,
etc..?

Thanks for the help,


 0
9/30/2008 12:17:54 PM
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cpliu,

I have come up with a suggestion.  Basically, I took your "average" two
ways.  One way would be to look at the Total Average for all days over time,
and the second would be to look at the individual days themselves.

Basically, the start and stop time can be Differenced out (C2 - B2), with
that you can get an average travel time by taking the =AVERAGE(D2:D11)
formula.  The second alternative (by Day) would require you to write a
SUMIF/COUNTIF statement.  My example has the formula
=SUMIF(A2:A11,"Mon",D2:D11)/COUNTIF(A2:A11,"Mon") as per below.

Start	Stop	Diff
Mon	7:00	8:00	1:00		Total Avg
Tue	7:15	8:45	1:30		1:07
Wed	7:02	7:58	0:56
Thu	7:00	8:00	1:00		Mon Avg
Fri	7:15	8:45	1:30		0:58
Mon	7:02	7:58	0:56
Tue	7:00	8:00	1:00
Wed	7:15	8:45	1:30
Thu	7:02	7:58	0:56
Fri	7:00	8:00	1:00

--
--Thomas [PBD]
Working hard to make working easy.

"cpliu" wrote:

> I have data of travel time between 2 locations each day. There are
> columns such as date, start time and end time in multiple columns.
>
> How can I find the average of travel time on Monday, Tuesday, Wed etc
> and the average of travel time if start time is between 7:00 to 7:30,
> etc..?
>
> Thanks for the help,
>
>
>

 0
ThomasPBD (13)
9/30/2008 1:17:00 PM
> Basically, the start and stop time can be Differenced out (C2 - B2), with
> that you can get an average travel time by taking the =3DAVERAGE(D2:D11)
> formula. =A0The second alternative (by Day) would require you to write a
> SUMIF/COUNTIF statement. =A0My example has the formula
> =3DSUMIF(A2:A11,"Mon",D2:D11)/COUNTIF(A2:A11,"Mon") as per below.

Thank you, Thomas. That's great. I have all the date entered as month,
day, year like 08/21/2008. Is there a function that I can convert them
to Monday, Tuesday, etc in a different column?

Thanks,

cpliu

 0
9/30/2008 2:12:43 PM
Hi

In column E
=TEXT(A1,"ddd")
Base your formulae on column I and D rather than A and D
=SUMIF(E2:E11,"Mon",D2:D11)/COUNTIF(E2:E11,"Mon")

Alternatively, if you didn't want to use another column
=SUMPRODUCT(--(Weekday(A2:A11,2)=1),D2:D11))/SUMPRODUCT(--(Weekday(A2:A11,2)=1))
where 1 = Monday, 2 = Tuesday etc.
--
Regards
Roger Govier

"cpliu" <spamfreeliu@yahoo.com> wrote in message
>
>> Basically, the start and stop time can be Differenced out (C2 - B2), with
>> that you can get an average travel time by taking the =AVERAGE(D2:D11)
>> formula.  The second alternative (by Day) would require you to write a
>> SUMIF/COUNTIF statement.  My example has the formula
>> =SUMIF(A2:A11,"Mon",D2:D11)/COUNTIF(A2:A11,"Mon") as per below.
>
> Thank you, Thomas. That's great. I have all the date entered as month,
> day, year like 08/21/2008. Is there a function that I can convert them
> to Monday, Tuesday, etc in a different column?
>
> Thanks,
>
> cpliu


 0
Roger
9/30/2008 2:31:24 PM

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