I'm stuck in this exercise. it's hard to figure

MATT-l lJII-Ei'NCBM [ll-42 Elementary.r Statistics with Support Distance Learning Estimate Mean and Standard Deviation from a Graph Find the following based on the graph. Assume it is close enough to bell-shaped to applyr the 95% rule. E. Mean. 9. Interval containing center 95% of values Standard deviation based on interval chosen. Create a Histugram by Hand '3". Create a dotplnt by hand of the data shown below for ages of family and friends. \"In-nun\" For each ageI place a dot above the maJ'ke-d value it is closest to, directly on top oftlle line coming up from that number. Do not estimate where the value would fall between two marked values. For example, the rst value in the list is 315, which is closest to 41] on the number line below. This value would give us a dot directly over 41], as shown. Stack the dots vertically as needed, as if sliding wooden heads onto a post. CI 10 20 30 4D 50 60 7|} ED SCI 100