Significance test using the t distribution. A test of a null hypothesis versus a two-sided alternative gives t = 2.18.
(a) The sample size is 18. Is the test result significant at the 5% level? Explain how you obtained your answer.
(b) The sample size is 10. Is the test result significant at the 5% level? Explain how you obtained your answer
(c) Sketch the two t distributions to illustrate your answers.