A researcher found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who did not own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (in terms of age and health) who do not own dogs. The researcher records the number of visits to the doctor during the past year for each person. The data are as follows. Instruction Set I Instruction Set II 5 5 5 5 9 10 10 6 (a) Is there a significant difference in time for the two sets of instructions? Use a two-tailed test at the 0.05 level of significance. (Use 3 decimal places.) t-critical = RN_1547100_14_ {"js_version":0} t= RN_1547100_14_ {"js_version":0} Conclusion mc Fail to reject the null hypothesis, there is not a significant difference between the two sets of instructions. Reject the null hypothesis, there is not a significant difference between the two sets of instructions. two sets of instructions. Reject the null hypothesis, there is a significant difference between the Fail to reject the null hypothesis, there is a significant difference between the two sets of instructions. RC_1547100_14_ {} (b) Calculate the estimated Cohen's d and r2 to measure effect size for this study. (Use 3 decimal places.) d= RN_1547100_14_ {"js_version":0} r2 =