Question

calculate the mean for the frequency distribution table given below ,by direct method
class interval 5-15,15-25,25-35,35-45,45-55, frequency 4,3,6,5,2.​

Answer 1

Solution :-

Class -------------- Fi ----------- Xi ------------- FiXi

5 - 15 -------------- 4 ------------ 10 ------------- 40

15 - 25 -------------3 ------------ 20------------- 60

25 - 35 -------------6 ------------30 ------------- 180

35 - 45 -------------5 ------------40 ------------- 200

45 - 55 -------------2 ------------50 ------------- 100

⅀Fi = 20 ⅀FiXi = 580

we know that,

• Mean = ⅀FiXi / ⅀Fi

so,

→ Mean = 580/20

→ Mean = 58/2

→ Mean = 29 (Ans.)

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Answer 2

Answer:

Nice answers bro

Step-by-step explanation:

Good to hear from you