Explanation:Pandas represents timestamps in nanosecond resolution. 3. Which of the following object has a method cov to compute covariance between series ?
A. Series
B. DataFrame
C. Panel
D. None of the Mentioned
Answer:A
Explanation:Pandas represents timestamps in nanosecond resolution. 3. Which of the following object has a method cov to compute covariance between series ?
A. Series B. DataFrame C. Panel D. None of the Mentioned
Explanation:DataFrame has a method cov to compute pairwise covariances among the series in the DataFrame, also excluding NA/null values. 4. Which of the following specifies the required minimum number of observations for each column pair in order to have a valid result ?