Data Analytics I Week 5
Quiz by Cynthia Marcello
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72 questions
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- Q1What is the definition of descriptive statistics?An approach that uses hypothesis testing to determine the likelihood of an event.A process that involves collecting, organizing, and summarizing data with the main goal of making conclusions about a population.A statistical technique used for making predictions and inferences about a population based on a sample.A branch of mathematics that deals with the collection, analysis, interpretation, and presentation of numerical data.A summary of data using measures such as mean and standard deviation to describe and understand the main features of the data.30s
- Q2What is the purpose of hypothesis testing?To calculate the probability of an event occurring in a sample.To establish a cause-and-effect relationship between two variables.To summarize and organize data using measures such as mean and standard deviation.To determine whether there is enough evidence to support or reject a claim about a population.30s
- Q3What is the definition of probability?A method of summarizing and organizing data using measures such as mean and standard deviation.The measure of the likelihood that an event will occur.A technique for determining cause-and-effect relationships between variables.A statistical test used to compare two population means.30s
- Q4What is one-hot encoding used for?Representing categorical variables as numerical vectorsData compressionPerforming statistical analysisEncoding images30s
- Q5Which is an example of a categorical variable?HeightEye colorAgeWeight30s
- Q6Which is an example of a continuous variable?TemperatureGenderMarital statusBlood type30s
- Q7Which is an example of a nominal variable?AgeFruit typesTemperatureHeight30s
- Q8Which is an example of a discrete variable?AgeNumber of siblingsWeightHeight30s
- Q9Which is an example of a ordinal variable?Marital statusEye colorEducational levelBlood type30s
- Q10Which is an example of a ratio variable?IncomeFavorite colorFavorite moviePolitical affiliation30s
- Q11Which is an example of a quantitative variable?Eye colorHeightMarital statusFruit types30s
- Q12How does a data dictionary benefit database administrators?It ensures data integrity.It provides a central repository of metadata.It automates data backup.It improves query performance.It encrypts sensitive information.30s
- Q13What is the purpose of a data dictionary?To encrypt sensitive information in a database.To create backup copies of a database.To define and describe the data elements within a database.To optimize database performance.To compile statistical analysis on data.30s
- Q14Which of the following is an example of a hypothesis suitable for data science?Giraffes have the longest necks in the animal kingdom.Changing the pricing strategy will increase sales by 10%.The weather affects consumer behavior.The human brain can be simulated using artificial intelligence.30s
- Q15Which of the following is an example of a descriptive statistic?The slope of a regression line.The p-value of a statistical test.The average height of a sample of 100 people.The correlation coefficient between two variables.30s