In all likelihood.

The state or quality of being probable.

plural of probable

Obsolete form of probably.

Likely or most likely to be true. / Likely to happen. / Supporting, or giving ground for, belief, but not demonstrating. / (obsolete) Capable of being proved.

Something that is likely. / A person who is likely to appear or do a certain thing.

The state of being probable; likelihood. / An event that is likely to occur. / The relative likelihood of an event happening.

plural of probability

(probability theory) probability density function

Graph paper with vertical and horizontal rules, the latter spaced evenly and the former according to a scale that allows a plotted probability curve — usually that of a normal distribution — to appear linear.