Question

In Exercises 29–32, find the mean of the data summarized in the frequency distribution. Also, compare the computed means to the actual means obtained by using the original list of data values, which are as follows: (Exercise 29) 36.2 years; (Exercise 30) 44.1 years; (Exercise 31) 224.3: (Exercise 32) 255.1. 30. 29. Frequency Age (yr) of Best Actress When Oscar Was Won 20-29 28 30-39 Frequency 29 34 14 3 5 Age (yr) of Best Actor When Oscar Was Won 20-29 30-39 40-49 50-59 60 69 70-79 36 15 6 40 49 50-59 60-69 70-79 80-89 1 1 1 mid Dlatelet

Answer 1

А с D E F G K B Age(yr) of Best Actress when 29 Frequency(f) midpoint (x) Xf 30 xf 1 Oscar Was Won 2 20-29 29 24.5 710.5 24.5 3 30-39 34 1173 H Age(yr) of Best Actress When Frequency(f) midpoint (x) Oscar Was Won 20-29 1 24.5 30-39 28 34.5 40-49 36 44.5 50-59 15 54.5 60-69 6 64.5 70-79 1 74.5 Sum 87 966 40-49 14 34.5 44.5 54.5 4 5 623 TIT 50-59 3 1602 817.5 387 163.5 322.5 6 60-69 5 7 1 64.5 74.5 84.5 74.5 74.5 70-79 80-89 Sum 1 84.5 8 9 3871.5 87 3151.5 10

36.2241 er 29) Exf 3151.5 Et 87 yeces. Mean . ext = 30 1 1 rean = Ix.f 3871.5 - 44.5 years. Et 87 an 69 the mean is equal upto One docimal pointa The actual moon is less than the mean using the asigings listo gn 30