Using a chi-square goodness –of-fit test you can decide, with some degree of certainty, whether ...

     Using a   chi-square goodness –of-fit test you can decide, with some degree of   certainty, whether a variable is normally distributed. In all chi-square   tests for normality, the null and alternative hypotheses are as follows. Ho:   The test scores have a normal distribution. Ha: The test scores do not have a   normal distribution. Find the expected frequencies. Round to the nearest   integer as needed. Class boundaries 49.5 - 58.5 58.5 - 67.5 67.5 - 76.5 76.5   – 85.5 85.5 – 94.5 Frequency, f 18 61 83 33 5 Expected frequency Determine   the Critical value, Xo2 = Calculate the test statistic X2 =