Question

find mean AND std deviation

Frequency Stock analysis. The price caming ration of 100 randomly selected stocks from the New York Glock Exchange are Interval -0.5-45 45-95 95145 14.5-195 19.5-245 245-295 29.5-345 INNOR a. Find the mean of the price caring ratios (Type an integer or a decimal Round to two decimal places)

Answer 1

28 Solution: Class (1) -0.5-4.5 4.5-9.5 9.5 - 14.5 14.5 - 19.5 19.5 - 24.5 24.5 - 29.5 29.5-34.5 Frequency (0) Mid value (x) (2) (3) 14 2 45 7 22 12 10 17 2 22 3 27 4 32 fox sx-r-x) () (1)-(2) (3) (5) - (1) (3) 56 315 2205 264 3168 170 2890 968 81 2187 128 4096 - 100 St-x-1030 S - 15570 Σά Mean - 1030 100 103

Answer : Mean = 10.30

(1 x) Sr. Sample Standard deviations- (1030) 15570 - 100 99 15570 - 10609 99 4961 99 50.1111 7.0789

Standrd deviation = 7.0789