Mean for Grouped Data

What are the values of the class marks (x­_m) in correct order?

• 69, 72, 75, 78, 81, 84, 87

• 69, 71, 81, 83, 85, 87, 88

• 68, 70, 80, 82, 84, 86, 88

• 68, 73, 78, 83, 88, 93, 98

What are the values of fx­_m in proper order?

• 280, 366, 567, 660, 684, 923

• 280, 366, 660, 684, 923, 567

• 280, 366, 660, 923, 684, 567

• 280, 366, 660, 567, 684, 923

Which of the following values are correct based on the frequency table shown?

• n = 35 ; Σfx­_m = 3358

• n = 40 ; Σfx­_m = 3358

• n = 35 ; Σfx­_m = 3385

• n = 40 ; Σfx­_m = 3385

Which of the following is correct based on the table shown?

• n = 35 ; Σfx­_m = 1444

• n = 35 ; Σfx­_m = 1445

• n = 40 ; Σfx­_m = 1455

• n = 40 ; Σfx­_m = 1555

Which of the following is true about the frequency table shown?

• n = 50 ; Σfx­_m = 3895

• n = 55 ; Σfx­_m = 3895

• n = 50 ; Σfx­_m = 3890

• n = 55 ; Σfx­_m = 3890

What is the mean of the grouped data?

• 19.75

• 20.75

• 21.75

• 22.75

What is the mean of the grouped data?

• 33.4

• 35.4

• 37.4

• 39.4

What is the mean of the grouped data?

• 64.5

• 66.5

• 68.5

• 70.5

What is the mean of the grouped data?

• 81.86

• 82.86

• 83.86

• 84.86

What is the mean of the grouped data?

• 14

• 16

• 18

• 20