The appropriate statistical method to compare the two groups (phone calls vs text messages) would be a Chi-Square Test for Independence. Explanation: The Chi-Square Test for Independence is used to determine if there is a significant relationship between two nominal (categorical) variables. In this case, the two variables are the reminder method (phone calls or text messages) and the outcome (appointment kept or missed). The null hypothesis (H0) would be that there is no relationship between the reminder method and whether the appointment is kept or missed. The alternative hypothesis (H1) would be that there is a relationship between the reminder method and whether the appointment is kept or missed. By comparing the observed frequencies of missed and kept appointments for each reminder method to the frequencies we would expect if there was no relationship, we can determine if the reminder method has a significant effect on whether appointments are missed or kept. If the p-value from the Chi-Square Test is less than our chosen significance level (usually 0.05), we would reject the null hypothesis and conclude that the reminder method does have a significant effect on whether appointments are missed or kept. rewrite as 1st person