Discussion:
Q1 - What is our decision regarding the differences between the observed and expected frequencies if the critical value of chi-square is 9.488 and the computed value is 6.079?
1 - The difference is probably due to sampling error and we should not reject the null hypothese.
2 - Not due to chance; reject the null hypothesis
3 - Not due to chance; do not reject the null hypothesis
4 - Too close; reserve judgment.
Q2- A hypothesis test that rho is zero is conducted at the 5% level of significance. If Spearman's rho is 0.86 for a sample of 15 observations, what is the computed value of the t statistic?