(i) The null and alternative hypotheses are (use symbols)
Ho:_____________________________________ Ha: ________________________________________
(ii) the test value (test statistics) is:
___________________________________________________________
___________________________________________________________
(iii) At 5%, the critical value from the tables will be:
(a) 1.645
(b) - 1.645
(c) 1.96
(d) - 1.96
(e) 1.28
(iv) At the 5% level, the statistical conclusion will be
(a) Accept Ho, since _______________________________________________________
(b) Reject Ho, since _______________________________________________________
(v) The word conclusion will be
(a) Accept Ho, the proportion of tractor batteries lasting at least 3 years is 95%.
(b) Accept Ho, there is not enough evidence to say the proportion of tractor batteries lasting at least 3 years is less tha 95%.
(c) Reject Ho, the proportion of tractor batteries lasting at least 3 years is less than 95%.
(d) Reject Ho, the proportion of tractor batteries lasting at least 3 years is 95%.
(vi) Interpreting the results of the test: Interstate Batteries will be able to offer the new replacement warranty
YES
NO