A health worker in a village recorded the haemoglobin levels (g/dL) of 30 women. Classes 8-10, 10-12, 12-14, 14-16 had frequencies 6, 12, 9, 3. Using the assumed mean method with a = 13, compute the mean haemoglobin level.

Question

Accepted Answer

11.6. Class marks: 9,11,13,15. di = xi-13 = -4,-2,0,2. fi*di = 6*-4+12*-2+9*0+3*2 = -24-24+0+6 = -42. sum fi = 30. Mean = 13 + -42/30 = 13 - 1.4 = 11.6.

A health worker in a village recorded the haemoglobin levels (g/dL) of 30 women.
Classes 8-10, 10-12, 12-14, 14-16 had frequencies 6, 12, 9, 3.
Using the assumed mean method with a = 13, compute the mean haemoglobin level.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Mean of Grouped Data practice

A health worker in a village recorded the haemoglobin levels (g/dL) of 30 women.Classes 8-10, 10-12, 12-14, 14-16 had frequencies 6, 12, 9, 3.Using the assumed mean method with a = 13, compute the mean haemoglobin level.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Mean of Grouped Data practice

A health worker in a village recorded the haemoglobin levels (g/dL) of 30 women.
Classes 8-10, 10-12, 12-14, 14-16 had frequencies 6, 12, 9, 3.
Using the assumed mean method with a = 13, compute the mean haemoglobin level.