Based on the five major approaches in data analysis, which of the following are incorrect?1) Dimensionality reduction: to reduce the number of attributes in a dataset to improve the accuracy of the model2) Comparison: to evaluate and compare values between two or more data points3) Hypothesis: to make assumptions about the results, and then verify whether the results are true or not4) Splitting: to trim down a process from large to small, it usually divides the problem into two partsQuestion 12Select one:a.2,3b.1,3c.2,4d.1,4

1. What is the primary objective of data wrangling?  a) Data visualization  b) Data cleaning and transformation  c) Statistical analysis  d) Machine learning modeling

Which of the following techniques would perform better for reducing dimensions of a data set?(1 Point)removing columns which have too many missing valuesremoving columns which have high variance in dataremoving columns with dissimilar data trendsnone of these

The two principles that are followed to analyse data efficiently are:1 pointAbsolutes (characterised by data elements that are certainly true) and susceptibles (characterised by data elements that are doubtful)Absolutes (characterised by people, objects, locations and events) and exploitables (what can be extracted from the users)Absolutes (characterised by data elements that are certainly true) and exploitables (what can be extracted from the users)Trustworthiness (characterised by a strict check of data analysts) and reliability (characterised by compliance to strict safety regulations for technology used in the analysis)4.Question 4

Based on the results of data analysis, scientists _____, which is the fourth step in the scientific method.Multiple choice question.make operational definitionsdraw conclusionscrunch numbersdevelop hypotheses

Which of the following is not a data reduction technique?a.Feature creationb.samplingc.Normalizationd.Dimensionality reduction