Install this version:
emerge -a =dev-perl/Statistics-TTest-1.1.0
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-perl/Statistics-TTest-1.1.0
Or alternatively:
emerge --autounmask-write -a =dev-perl/Statistics-TTest-1.1.0
# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
DIST_AUTHOR=YUNFANG
DIST_VERSION=1.1.0
inherit perl-module
DESCRIPTION="module to compute the confidence interval"
SLOT="0"
KEYWORDS="~amd64 ~x86"
RDEPEND="
>=dev-perl/Statistics-Distributions-1.20.0
>=dev-perl/Statistics-Descriptive-3.60.300
"
BDEPEND="${RDEPEND}
"
>=dev-perl/Statistics-Distributions-1.20.0 >=dev-perl/Statistics-Descriptive-3.60.300
>=dev-perl/Statistics-Distributions-1.20.0 >=dev-perl/Statistics-Descriptive-3.60.300