The 2016 American Wedding Study provides information related to weddings in the United States. Assume that the results are based on a sample of 3,600 brides. Calculate the standard error and construct a 95 percent confidence interval for the unknown population mean.

a. Average total amount spent on a wedding is $26,522. Assume that the population standard deviation equals $6,000.

b. The average amount spent on the wedding reception is $11,380. Assume that the population standard deviation equals $3,000.

c. Average number of bridal attendants is 5.3. Assume that the population standard deviation equals 1.7 attendants.

d. On average, a bridesmaid’s dress costs $133. Assume that the population standard deviation equals $40.

e. The couple is engaged for an average of 14.4 months. Assume that the population standard deviation equals 3 months.

f. The average amount spent on a wedding cake is $417. Assume that the population standard deviation equals $130.