CISDM Prep

Select the correct statement!

Select two options!

• The second stage of data science methodology is data understanding.

• The first stage of data science methodology is modeling.

• The first stage of data science methodology is business understanding.

• The first stage of data science methodology is data collection.

In a study conducted as part of the AUAS project, researchers investigated the optimal time to replace aircraft tires. The study utilized historical data, including factors like aircraft weight, braking action, runway length, and temperature. This data was then cleaned and consolidated into a single dataset. Based on this scenario, which phase of the CRISP-DM Process Methodology should be executed?

• Data understanding

• Data modeling

• Data preparation

• Business understanding

Which of the following statements is incorrect regarding the goals of the CRISP-DM methodology?

• Encourage interoperable tools across the entire data mining process.

• Demystify and reduce the need for high-priced expertise in simple data mining tasks.

• All statements are true.

"Which of the following definitions accurately describes the concept of a statistical distribution?

• A distribution is a mathematical function that is associated with the data.

• A distribution is a chart that visualizes the data.

• A distribution is a table that contains the data.

• All of these definitions describe the concept of a statistical distribution.

In statistics, a sequence or vector of random variables is considered to exhibit homoscedasticity if:

• All variables in the sequence or vector have increasing variance.

• All variables in the sequence or vector have the same finite variance.

• One predictor variable can be linearly predicted from the others with a substantial degree of accuracy.

• All variables in the sequence or vector are bounded to the range [−1,1][−1,1]."

"The record of electric consumption provides information about daily wattage consumed over a span of 10 days, measured in kWh. The measurements are as follows: 53.2, 65.8, 57.2, 49.7, 61.2, 55.2, 70.2, 59.5, 58.2, and 60. What is the average daily watt consumption?

• 57.3

• 62.1

• 58.4

• 59.02

Which of the following is not an example of a statistical measure?

• Annual unemployment rate in a country.

• Annual rice consumption in a country.

• Gini Index.

• Monthly housing price in a city.

• All of the above points are correct.

Which of the following is an example of categorical data?

• Number of fire hydrants in a city.

• Number of children at kindergarten.

• Length of the River Nile.

• Mode of fashion in a certain year.

Which of the following is an example of time series data?

Select two options!

• Baseball player's average stroke.

• Daily rainfall rate in a year.

• Annual average housing price in Bali.

• £Number of trees in Jardin du Luxemburg in Paris.

What is the Pearson Correlation coefficient between variables X and Y, if X = 0.9*Y

• 0.9

• 0

• 1

• -1

• -0.9