Median confidence interval algorithm -- Ratio statistics

[Warren Chrusciel]

Does anyone know what the algorithm is for calculating the confidence
interval for the median when using the Ratio Statistics Command in SPSS?
The following explanation from SPSS 15.0 help seems vague to me.


From SPSS help:

Confidence Interval for the Median (ratio statistics algorithms)

The confidence interval can be computed under the assumption that the
ratios follow a normal distribution or nonparametrically.


Thank you,

Warren Chrusciel
Municipal Property Assessment Corporation
Ottawa, Ontario, Canada

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

[Art Kendall]

click <help> <algorithms> type "ratio statistics algorithms" in the edit
box.


Art Kendall
Social Research Consultants

On 2/4/2010 2:19 PM, Warren Chrusciel wrote:

> Does anyone know what the algorithm is for calculating the confidence
> interval for the median when using the Ratio Statistics Command in SPSS?
> The following explanation from SPSS 15.0 help seems vague to me.
>
>
> > From SPSS help:
>
> Confidence Interval for the Median (ratio statistics algorithms)
>
> The confidence interval can be computed under the assumption that the
> ratios follow a normal distribution or nonparametrically.
>
>
> Thank you,
>
> Warren Chrusciel
> Municipal Property Assessment Corporation
> Ottawa, Ontario, Canada
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
>

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

[Alex Reutter]

There are two subtopics under "Confidence Interval for the Median (ratio statistics algorithms)"; click on "Distribution Free" and "Normal Distribution" under Related Topics or use the Contents pane.  There's a fair amount of the algorithms online help that could be better linked from topic to topic and it's a good idea to open the Contents pane to see what's there.

Alex


On 2/4/2010 2:19 PM, Warren Chrusciel wrote:
> Does anyone know what the algorithm is for calculating the confidence
> interval for the median when using the Ratio Statistics Command in SPSS?
> The following explanation from SPSS 15.0 help seems vague to me.
>
>
> > From SPSS help:
>
> Confidence Interval for the Median (ratio statistics algorithms)
>
> The confidence interval can be computed under the assumption that the
> ratios follow a normal distribution or nonparametrically.
>
>
> Thank you,
>
> Warren Chrusciel
> Municipal Property Assessment Corporation
> Ottawa, Ontario, Canada

[Warren Chrusciel]

Thanks to Art Kendall and you for your suggestions.  I found them helpful.

Warren

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD