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What Matplotlib function adds a legend to a plot? (Enter just the function name after plt.)

Code Correction: The following code is supposed to perform a groupby operation and calculate the mean salary by department, but it has errors. Identify and fix ALL the errors. avg_salary = df.groupby[“department”][“salary”].mean print(avg_salary) Write the corrected code below:

Given person = {“name”: “Alice”, “age”: 30}, how do you access the age?

What scikit-learn class is used for linear regression? (Enter the class name as it appears in code)

Code Correction: The following code is supposed to filter a DataFrame to show only rows where salary is greater than 50000 and department is ‘Sales’, but it has errors. Identify and fix ALL the errors. filtered = df[df[‘salary’] > 50000 and df[‘department’] == ‘Sales’] print(filtered) Write the corrected code below:

What DataFrame method sorts values by a specified column? (Enter just the method name)

How do you filter a DataFrame to get rows where ‘age’ > 30?

What NumPy function creates an array of evenly spaced values within a given range? (Enter just the function name after np.)

How do you filter a DataFrame to get rows where ‘age’ > 30?

Given arr = np.array([[1,2,3],[4,5,6]]), what is arr.shape?