Data Week - 2

What does SQL stand for?

• Simple Query Language

• Structured Question Language

• Structured Query Language

40 e-mails are detected as spam while 60 e-mails are ham.

What is the probability that a randomly selected e-mail is spam?

• 60%

• 40%

40 e-mails are detected as spam while 60 e-mails are ham.

What is the probability that a randomly selected e-mail is ham?

• 60%

• 40%

What is the purpose of scaling?

• Detecting outliers

• Having data of each column in the same scale

• Splitting the data into train and test

What does 2 * numpy.array([1, 2, 3]) return?

• array([2, 4, 6])

• array([3, 4, 5])

• array([1, 2, 3])

Which statement are correct for normal distribution?

• It doesn't have a skewness

• Mean, median, and mode are equal

• 68% of samples are located within the range of first standard deviations.

• All of statements are true.

Which of the followings can be used in imputation techniques?

• Mean

• Median

• Mode - most frequency

• All of them

You have the dataset of 10 million Azerbaijani citizens and you only made a query for Baku citizens to have 2 million citizens’ data.

Which of the followings explain the case best?

• Data of all Azerbaijani citizens is population data

  while that of Baku citizens is sample data

• Data of all Azerbaijani citizens is sample data

  while that of Baku citizens is population data

How could you comment the relationship between X and Y?

• Strong Positive Correlation

• No Correlation

• Strong Negative Correlation

How could you comment the relationship between X and Y?

• Strong Positive Correlation

• No Correlation

• Strong Negative Correlation