Python For Data Science week 3 Answers

 Which of the following is the correct approach to fill missing values in case of categorical variable?

 Mean

 Median

 Mode

 None of the above

Answer: c

Assume a pandas dataframe df_cars which when printed is as shown below. Based on this information, answer questions 2 and 3.

1 point

Of the following set of statements, which of them can be used to extract the column Type as a separate dataframe?

 df_cars[[‘Type’]]

 df_cars.iloc[[:, 1]

 df_cars.loc[:, [‘Type’]]

 None of the above

Answer : a,c

1 point

The method df_cars.describe() will give description of which of the following column?

 Car name

 Brand

 Price (in lakhs)

 All of the above

Answer: c

1 point

Which pandas function is used to stack the dataframes vertically?

 pd.merge()

 pd.concat()

 join()

 None of the above

Answer: b

1 point

Which of the following are libraries in Python?

 Pandas

 Matplotlib

 NumPy

 All of the above

Answer : d

Read the ‘flavors_of_cocoa.csv’ file as a dataframe ‘df_cocoa’ and answer questions 6-9.
The description of features/variables is given below:

1 point

Which of the following variable have null values?

 ID

 Company

 Review Date

 Rating

Answer: c

1 point

Which of the following countries have maximum locations of cocoa manufacturing companies?

 U.K.

 U.S.A.

 Canada

 France

Answer: b

1 point

After checking the data summary, which feature requires a data conversion considering the data values held?

 Rating

 Review date

 Company

 Bean origin

Answer: b

1 point

What is the maximum rating of chocolates?

 1.00

 5.00

 3.18

 4.00

Answer: b

1

Answer: d point

What will be the output of the following code?

 [bool, int, float, float, str]

 [str, int, float, float, str]

 [bool, int, float, int, str]

 [bool, int, int, float, str]

Answer: a