A scientist recorded the tail lengths (in cm) of two varieties of woodland salamanders: red-backed and lead-backed. The table below shows summary values.

(a) What is the value of the t test statistic for comparing the means?
(b) In the context of this study, state the null and alternative hypotheses.
(c) The P-value for the t test is 0.00003. If α = 0.05, what is your conclusion regarding the hypotheses in (b)?

Transcribed Image Text:

Redbacked Leadbacked Mean SD In 3.2 0.9 4.0 0.7 60 27