To determine whether IPhone users or Android users report a higher level of satisfaction with their phone, a random selection of IPhone users and Android users was selected where one user for each type of phone was 15-20 years old, one user for each type of phone was 20-25 years old, one user for each type of phone was 25-30 years old, and so on. Each user was asked to rate their level of satisfaction with their phone on a scale from 1 to 10 with 10 being the highest level of satisfaction. Can we infer that there is a difference between the satisfaction level of IPhone users and Android users? 13 marks Printout # ___________________ ?0: ________________________ ?1: ________________________ p-value: _____________ Conclusion: Reject ?0 Do not reject ?0

I-best for two proportions / Upper-tailed test: Difference 0.040 a : (Observed value) 1.200 s (Critical value) 1.645 p-value (one-tailed] 0.115 alpha I-test for two proportions / Two-tailed test: b 95% confidence interval on the difference between the proportions! (-0.025 , 0.105 ] totest for two paired samples / Two-tailed test: Difference 0 843 C : (Observed value] It| (Critical value) OF p value (Two-tailed) alpha\f\f