Question

Solve question no.6 by all three method to find mean of the data.

solve it with all method given below--
1 ) Direct mean method.
2) Assumed mean method.
3) Step Deviation method.

Answer 1

Step-by-step explanation:

class. frequency. class mark(xi). fi×xi

100-150. 4. 125. 500

150-200. 5. 175. 875

200-250 12. 225. 2700

250-300. 2. 275. 550

300-350. 2. 325. 650

Efi=25. Exifi=4275

X bar=Exifi/Efi

=4275/25

=171

this is direct method