t -test = (sample mean 1 – sample mean 2)/ [ sqrt (s1^2/n1 + s2^2/n2) ]

T-test uses means and standard deviations of two samples to make a comparison. The formula for T-test is given below: begin {array} {l}qquad t=frac {bar {X}_ {1}-bar {X}_ {2}} {s_ {bar {Delta}}} \ text { where } \ qquad s_ {bar {Delta}}=sqrt {frac {s_ {1}^ {2}} {n_ {1}}+frac {s_ {2}^ {2}} {n_ {2}}} \ end {array}

When reporting the result of an independent t-test, you need to include the t -statistic value, the degrees of freedom (df) and the significance value of the test (p -value). The format of the test result is: t (df) = t -statistic, p = significance value.