Read $$Sensor readings, with temperature, light, humidity every $5$ minutes at $8$

locations $($trial$,2014$ to $2015)$ and print the feature name with numbers of missing

entries.

$2.$ Fill in the missing entries. For filling any feature, you can use either the mean or

median value of the feature values from observed entries. Explain the reason behind

your choice and print replacement value of each feature.