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Hi, all.
I have a mxAlgebra of a parameter multiplied by a constant, say new_x = 2*x. When I construct an LBCI on both x and new_x, I expect that the CIs on new_x are the same as the CIs on x multiplied by 2. It turns out that they are not exactly the same (see the "diff" in the following output). When the constants are larger, say 5 or 10, the CIs on the new_x even become NA.
Any ideas why this happens? Thanks.
## Multiplied by 2 ## variance Two.two_variance.1.1. variance_x2 diff ## lbound 0.7693044 1.537972 1.538609 -0.0006373491 ## estimate 1.0030992 2.006198 2.006198 0.0000000000 ## ubound 1.3427832 2.688370 2.685566 0.0028032732
## Multiplied by 5 ## variance Five.five_variance.1.1. variance_x5 diff ## lbound 0.7693044 3.840211 3.846522 -0.006311445 ## estimate 1.0030992 5.015496 5.015496 0.000000000 ## ubound 1.3427832 NA 6.713916 NA
## Multiplied by 10 ## variance Ten.ten_variance.1.1. variance_x10 diff ## lbound 0.7693044 NA 7.693044 NA ## estimate 1.0030992 10.03099 10.030992 0 ## ubound 1.3427832 NA 13.427832 NA
Best,
Mike