निम्नलिखित आंकड़ों के लिए मानक विचलन (S.D) ज्ञात कीजिएः
20,22,27,30,31,32,35,40,45,48

Calculate the average deviation from the arithmetic mean and coefficient of mean deviation : 20 , 22 , 27 , 30 , 31 , 32 , 35 , 40 , 45 , 48

Which two signs should be interchanged in the following equation to make it correct? निम्नलिखित समीकरण को सही बनाने के लिए कौन से दो चिन्हों को आपस में बदलना होगा ? 405 + 27 xx 40 - 308 div 22 = 314

The age distribution of 400 persons in a colony having median age 32 is given below: {:("Age (in years) :", 20-25,25-30,30-35,35-40,40-45,45-50),("Frequency :", 110,x,75,55,y,30):} Then, x - y is

The age distribution of 400 persons in a colony having median age 32 is given below: {:("Age (in years) :", 20-25,25-30,30-35,35-40,40-45,45-50),("Frequency :", 110,x,75,55,y,30):} Then, x - y is

Calculate standard deviation for the following data : [{: ( Class Interval (C.I.) , Frequency (f) ) , (10-15,32), (15-20,28),(20-25,20),(25-30,16),(30-35,34),(35-40,10),(40-45,8):}]