Python for Data Science NPTEL | Week 3
Session: JAN-APR 2024/JULY-DEC 2023
Course name: Python For Data Science
Course Link: Click Here
These are NPTEL Python for Data Science Assignment 3 Answers
Q1. 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: Mode
Q2. 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
Q3. 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: Price (in lakhs)
These are NPTEL Python for Data Science Assignment 3 Answers
Q4. Which pandas function is used to stack the dataframes vertically?
pd.merge()
pd.concat()
join()
None of the above
Answer: pd.concat()
Q5. Which of the following are libraries in Python?
Pandas
Matplotlib
NumPy
All of the above
Answer: All of the above
Q6. Which of the following variable have null values?
ID
Company
Review Date
Rating
Answer: Review Date
These are NPTEL Python for Data Science Assignment 3 Answers
Q7. Which of the following countries have maximum locations of cocoa manufacturing companies?
U.K.
U.S.A.
Canada
France
Answer: U.S.A.
Q8. After checking the data summary, which feature requires a data conversion considering the data values held?
Rating
Review date
Company
Bean origin
Answer: Review date
Q9. What is the maximum rating of chocolates?
1.00
5.00
3.18
4.00
Answer: 5.00
Q10. 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: [bool, int, float, float, str]
These are NPTEL Python for Data Science Assignment 3 Answers
More Weeks of Python for Data Science: Click here
More Nptel Courses: Click here
Session: JAN-APR 2023
Course Name: Python for Data Science
Course Link: Click Here
These are NPTEL Python for Data Science Assignment 3 Answers
Q1. Which of the following is the correct approach to fill missing values in case of categorical variable?
a. Mean
b. Median
c. Mode
d. None of the above
Answer: c. Mode
Assume a pandas dataframe df_cars which when printed is as shown below. Based on this information, answer questions 2 and 3.
Q2. Of the following set of statements, which of them can be used to extract the column Type as a separate dataframe?
a. df cars[[’Type’]]
b. df cars.iloc[[:, 1]
c. df cars.loc[:, [’Type’]]
d. None of the above
Answer: a, c
These are NPTEL Python for Data Science Assignment 3 Answers
Q3. The method df_cars.describe() will give description of which of the following column?
a. Car name
b. Brand
c. Price (in lakhs)
d. All of the above
Answer: c. Price (in lakhs)
Q4. Which pandas function is used to stack the dataframes vertically?
a. pd.merge()
b. pd.concat()
c. join()
d. None of the above
Answer: b. pd.concat()
These are NPTEL Python for Data Science Assignment 3 Answers
Q5. Which of the following are liabraries in Python?
a. Pandas
b. Matplotlib
c. NumPy
d. All of the above
Answer: d. All of the above
Read the comma-separated values file hotel bookings.csv as a dataframe data hotel and answer questions 6 – 8. Please refer to Hotel Bookings Data Description.pdf for data and variable description.
Q6. Choose the appropriate command(s) to filter those booking details whose reservation-status are a No-show?
a.
b.
c.
d.
Answer: b, d
These are NPTEL Python for Data Science Assignment 3 Answers
Q7. From the same data, find how many bookings were not canceled in the year 2017?
a. 9064
b. 6231
c. 9046
d. None of the above
Answer: a. 9064
Q9. From the total bookings that were made in 2017 and not canceled, which month had the highest number of repeated guests?
a. July
b. February
c. January
d. None of the above
Answer: a. July
These are NPTEL Python for Data Science Assignment 3 Answers
Q9. What will be the output of the following code?
a. [bool, int, float, float, str]
b. [str, int, float, float, str]
c. [bool, int, float, int, str]
d. [bool, int, int, float, str]
Answer: a. [bool, int, float, float, str]
Q10. Which command is used to generate the plot shown below?
a. plt.plot(x, linestyle = “-”)
b. plt.plot(x, linestyle = “–”)
c. plt.plot(x, linestyle = “-.”)
d. plt.plot(x, linestyle = “:”)
Answer: a. plt.plot(x, linestyle = “-”)
These are NPTEL Python for Data Science Assignment 3 Answers
More Weeks of Python for Data Science NPTEL: Click here
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Session: JULY-DEC 2022
Course name: Python for Data Science
Link to Enroll: Click Here
These are NPTEL Python for Data Science Assignment 3 Answers
Q1. Choose the appropriate command(s) to filter those booking details whose reservation_status are a No-show?
a. data_hotel_ns datahotel. loc[data_hotel.reservation_status=’No-Show’]
b. data_hotel_ns = data_hotel[ data _hotel. reservation_status = “No-Show’]
c. data hotel_ns = data_hotel. reservation_status.loc [data_hotel.isin([‘No-Show’])]
d. data_hotel_ns = data_hotel.loc [data hotel. reservation_status. isin([ No-Show’])]
Answer:b, d
Q2. From the same data, find how many bookings were not cancelled in the year 2017?
a. 9064
b. 6231
c. 9046
d. None of the above
Answer: a. 9064
Q3. From the total bookings that were made in 2017 and not cancelled, which month had the highest number of repeated guests?
a. July
b. February
c. January
d. None of the above
Answer: c. January
These are NPTEL Python for Data Science Assignment 3 Answers
Q4. Which of the following commands can be used to create a variable Flag, and set the values as Premium when the rating is equal to or greater than 3.25, and otherwise as Regular?
a. dt_cocoa[°Flag’] = [“Premium” if x 3.25 else “Regular” for x in dt_cocoa[‘Rating’ ]]
b. dt_cocoa[“Flag’] = [“Premium” if x 3.25 else “Regular” for x in dt_cocoa[ _` Rating ‘]]
c. dt_cocoa[“Flag”] = np.where(dt_cocoa[ “Rating”] < 3.25, “Regular”, “Premium”)
d. None of the above
Answer: b, c
Q5. Which instruction can be used to impute the missing values in the column Review Data from the dataframe dt_cocoa by grouping the records company–wise?
Answer: a
Q6. After checking the data summary, which feature requires a data conversion considering the data values held?
a. Rating
b. Review Date
c. Company
d. None of the above
Answer: b. Review Date
These are NPTEL Python for Data Science Assignment 3 Answers
Q7. What is the maximum average rating for the cocoa companies based out of Guatemala?
a. 43.
b. 53.
c. 42.
d. None of the above
Answer: c. 42.
Q8. Which pandas function is used to stack the dataframes vertically?
a. pd.merge()
b. pd.concat()
c. join()
d. None of the above
Answer: b. pd.concat()
These are NPTEL Python for Data Science Assignment 3 Answers
Q9. Of the following set of statements, which of them can be used to extract the column Direction as a separate dataframe?
a. df_weather[[_`Direction ‘ ]]
b. df_weather.iloc[:,0]
c. df_weather.loc[:.[ ‘Direction ‘]]
d. None of the above
Answer: a, b
These are NPTEL Python for Data Science Assignment 3 Answers
Q10. Which one of these students’ average score across all subjects was the lowest? Which subject has the highest average score across students?
a. Harini, Maths
b. Sathi, Maths
c. Harini, Physics
d. Rekha, Maths
Answer: b. Sathi, Maths
These are NPTEL Python for Data Science Assignment 3 Answers
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