A marketing firm is doing research for an Internet-based company. It wants to appeal to the age group of people who spend the most money online. The company wants to know if there is a difference in the mean amount of money people spend per month on Internet purchases depending on their age bracket. The marketing firm looked at two age groups, 18-24 years and 25-30 years, and collected the data shown in the following table.Let Population 1 be the amount of money spent per month on Internet purchases by people in the 18-24 age bracket and Population 2bethe amount of money spent per month on Internet purchases by people in the 25-30 age bracket.Assume that the population variances are not the same.

	18-24 Years	2525-3030 Years
Mean Amount Spent	56.27	67.38
Standard Deviation	10.71	14.92
Sample Size	28	23

Step2of2: Interpret the confidence interval(17.48,4.74) obtained in Step 1

A.) Since the confidence interval does not contain zero, the data do not provide evidence that the population means are unequal ata90% confidence level.

C.) Since the confidence interval contains zero, the data do not provide evidence that the population means are unequal at a 90% confidence level.

C.) We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $4.74 and $17.48 more than the mean amount of money spent on Internet purchases for ages 25-30 years.

D.) We are 90% confident that the mean amount of money spent on Internet purchases for ages 18-24 years is between $4.74 and $17.48 less than the mean amount of money spent on Internet purchases for ages 25-30 years.