[R] Issue with 95% CI using MASS{confint}

Jennifer Sweatman jenn.sweatman21 at gmail.com
Thu May 28 19:11:50 CEST 2015


Hi all,

Thank you for your responses. Unfortunately, setting level=0.9500001 or
0.949999 did not work for me. I followed your code, Duncan, and some of my
tau values are less than 2.  I don't know how to interpret this
information, however. Can you point me in the direction to a reference?

Thanks,

Jenn

On Thu, May 28, 2015 at 11:22 AM, Duncan Murdoch <murdoch.duncan at gmail.com>
wrote:

> On 28/05/2015 9:08 AM, sami.toppinen at kolumbus.fi wrote:
>
>> I encountered the same problem today. It seems to occur only when you
>> use exactly 95 % as the confidence level. For example:
>>
>> > confint(g1)
>> Waiting for profiling to be done...
>>          2.5%      97.5%
>> a0 1.257512   1.330881
>> KP       NA 163.862932
>> > confint(g1, level = 0.95)
>> Waiting for profiling to be done...
>>          2.5%      97.5%
>> a0 1.257512   1.330881
>> KP       NA 163.862932
>> > confint(g1, level = 0.950001)
>> Waiting for profiling to be done...
>>            2.5%      97.5%
>> a0   1.257512   1.330881
>> KP 125.814534 163.862996
>> > confint(g1, level = 0.949999)
>> Waiting for profiling to be done...
>>            2.5%      97.5%
>> a0   1.257512   1.330881
>> KP 125.814709 163.862802
>>
>
> That's very strange.  It would be nice to see a reproducible example.
>
> Duncan Murdoch
>



-- 
Jennifer Sweatman
PhD Candidate
Seagrass Ecosystems Lab
Florida International University

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