Sumita Arora Solution

Ans:(i) sum()(ii) count()(iii) mean()(iv) meadian()(v) mode()(vi) std()(vii) var()(viii) max()

Ans:No the result of sub() and rsub() is not same because performing subtraction on two different operands in different order can produce different result.for example:A.sub(B) -> A – BandA.rsub(B) -> B – A

Ans:(i) A + B(ii) B + A(iii) A – B(iv) B – A(v) B – A(vi) B * A(vii) B / A(viii) B / A

Ans:1. iterrows()2. iteritems()

Ans:We can use rename() to rename the index/column names in a Dataframe.Syntax:df.rename(index = {<name dictionary>}, column = {<name dictionary>})

Ans: We can delete rows ( it is asking to delete multiple rows) in various ways as given below:df.drop(range(start, end, step))ordf.drop([1,3,7])* here 1,3 and 7 are row index to be deleted

Ans:del <dataframe objct>[<column name>]for exampledel df[‘first’]

at iat It is label based single value selection method It is index based single value selection method

loc iloc It is label based selection method It is index based selection method Both start label and end label are included when given as start:end Like slices end index or position is excluded when given as start:end

Ans:df.iloc[3:9,7] = 750