For each of Exercises 57–60, do the following:

  1. Find the point estimate of the population mean.
  2. Calculate .
  3. Find for a confidence interval for the indicated confidence level.
  4. Confirm that the conditions for constructing a interval are met.
  5. Construct and interpret a confidence interval with the indicated confidence level for the population mean.

Question 8.60

60. Latino Tobacco Consumption. The Bureau of Labor Statistics reported that the mean amount spent by all American citizens on tobacco products and smoking supplies is $308; the mean for American Latinos is $177. Assume that , the standard deviation for American Latinos, equals $150. Assume that the data on American Latinos represents a sample of size 36. Let the confidence level be 90%.