#help

  1. O

    Statistics Homework

    It is known that the passing score in the last board exam for BSED is 84%. A group of 145 examinees took the test and obtained a mean scores of 88%. Do the results indicate that this batch is significantly better then the previous batches? Test the claim at 0.05 level of significance, if the...
  2. R

    Z test or T test?

    Looking at a spider diagram I assumed that i should use a Z-test for this hypothesis test however the solutions are saying a T-testing using an F-test to see if the variances are the same. Someone please help me understand :shakehead:shakehead . A survey was conducted on attitudes towards...