A graduate student researching lifestyle issues in Argentina does a survey of 235 people and finds that on average there are 59.3 cell phone subscribers per 100 people. The standard deviation is 29.2. Does she have enough evidence to conclude with a 10% level of significance that the claim that the Argentine population cell phone use is different from the global cell phone use average of 55 per 100 people?

1. Is the test statistic z or t?

2. What is the test statistic?

3. If using the rejection region approach, what is the relevant bound of the rejection region?

4. If using the p value approach, what is the p value?

5. What is the decision?