Explain what listwise deletion is.
Question
Explain what listwise deletion is.
Solution
Listwise deletion, also known as complete case analysis, is a method used in data analysis when dealing with missing data. Here are the steps to explain what listwise deletion is:
-
Identification of Missing Data: The first step in listwise deletion is to identify the presence of missing data in your dataset. This could be represented in various ways such as 'NA', 'null', 'NaN', or blanks.
-
Understanding the Nature of Missing Data: Before deciding to use listwise deletion, it's important to understand the nature of the missing data. If the data is missing completely at random (MCAR), then listwise deletion might be a suitable method. However, if the data is missing not at random (MNAR), listwise deletion could lead to biased results.
-
Applying Listwise Deletion: Once you've identified and understood your missing data, you can apply listwise deletion. This means that if any single value is missing in a row of your dataset, then the entire row will be deleted. This is done to ensure that the analysis is conducted on complete cases only.
-
Analyzing the Impact: After applying listwise deletion, it's important to analyze the impact on your dataset. This method can significantly reduce the size of your dataset, especially if there's a lot of missing data. This could potentially lead to loss of valuable information and statistical power.
-
Proceeding with Analysis: If the impact of listwise deletion is deemed acceptable, you can then proceed with your data analysis. However, if too much data is lost, you might need to consider other methods of handling missing data, such as imputation.
Remember, listwise deletion is a simple and commonly used method for handling missing data, but it's not always the best method. It's important to understand the nature of your missing data and consider the impact of listwise deletion before deciding to use this method.
Similar Questions
By deleting element in a list, what is the different between pop and del ?
Input: 3 (Size), 1 2 3 (Initial elements)Output: List before deletion: 1 2 3Output: List after deletion: 1 2Public Test Cases:# INPUT EXPECTED OUTPUT1 3123List before deletion :1 2 3 List after deletion 1 2
The remove operation returns a boolean value that indicates if the element to be removed was found in the list. A. True B. False
What does the following Python code snippet do?def delete_node(self, key): temp = self.head if temp is not None: if temp.data == key: self.head = temp.next temp = None return while temp is not None: if temp.data == key: break prev = temp temp = temp.next if temp == None: return prev.next = temp.next temp = NoneDeletes the first occurrence of a node with the specified keyDeletes all nodes with the specified keyInserts a node with the specified key at the beginning of the linked listReverses the linked list
A remove operation for a list ADT removes the specified item. Given a list with contents: 2, 20, 30, what is the list after the following operation?Remove(list, item 2)
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.