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Statistics and Data Analysis
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If Q1 = 25 and Q3 = 45, what is the Quartile Deviation?
The mean of two groups is 55 and 65 with sample sizes 40 and 20 respectively. What is the combined mean?
Which visualization is most appropriate to observe distribution of a single numerical variable?
A sample of size 25 has mean 52. The population mean is 50 and the population standard deviation is 10. What is the Z-statistic?
Which sklearn preprocessing technique scales features using minimum and maximum values?
Which type of data format is commonly used in APIs and web services?
Which pandas function is used to remove duplicate rows?
Which pandas method converts categorical values into dummy variables for modeling?
The mean of a dataset is 80 and the standard deviation is 8. What is the Z-score of value 96?
A hypothesis test is conducted at significance level α = 0.05. If the p-value = 0.08, what is the correct decision?