4) (10 points) A consumer spending survey determined that the mean spending in 10 categories of consumers for 303 respondents in the 18-34 age group was $93.76 with a standard deviation of $23.23. For 478 respondents in the 35+ age group, the mean and standard deviation were $90.65 and $23.01, respectively. At the 95% confidence level, determine if there is a significant difference between the two age groups with regard to average spending amounts. Explain how you arrived at your conclusion