Answer Happy

How do I figure out what two values will approximately 95%of the amounts be?
Lunch break: In a recent survey of 655 working Americans ages 25-34, the average weekly amount spent on lunch was $45.44 with standard deviation $2.78. The weekly amounts are approximately bell-shaped. Part 1 of 3 (a) Estimate the percentage of amounts that are between $42.66 and $48.22. Approximately 68% of the amounts fall between $42.66 and $48.22. Part 2 of 3 (b) Estimate the percentage of amounts that are between $37.10 and $53.78. of the amounts fall between $37.10 and $53.78. Almost all Part: 2/3 Part 3 of 3 (c) Between what two values will approximately 95% of the amounts be? Approximately 95% of the amounts fall between $ and S X