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Which of the following sampling methods would MOST likely result in a representative sample?
A county in Illinois is conducting a survey to determine the mean annual income per household. The county is 427sq mi (2.65q km). Which of the following sampling methods would MOST likely result in a representative sample?A . A stratified phone survey of 100 people that is conducted between 2:00...
Which of the following data sampling methods involves dividing a population into subgroups by similar characteristics?
Which of the following data sampling methods involves dividing a population into subgroups by similar characteristics?A . SystematicB . Simple randomC . ConvenienceD . StratifiedView AnswerAnswer: D Explanation: Stratified sampling is a data sampling method that involves dividing a population into subgroups by similar characteristics, such as age, gender, income,...
Which of the following data manipulation techniques is an example of a logical function?
Which of the following data manipulation techniques is an example of a logical function?A . WHEREB . AGGREGATEC . BOOLEAND . IFView AnswerAnswer: D Explanation: This is because an IF function is a type of logical function that returns a value based on a condition or a set of conditions....
Which of the following is the correct data type for text?
Which of the following is the correct data type for text?A . BooleanB . StringC . IntegerD . FloatView AnswerAnswer: B Explanation: A string is a data type that represents a sequence of characters, such as text, symbols, numbers, or punctuation marks. Strings are enclosed in quotation marks, such as...
Which of the following is an example of a at flat file?
Which of the following is an example of a at flat file?A . CSV fileB . PDF fileC . JSON fileD . JPEG fileView AnswerAnswer: D
Which of the following should be accomplished NEXT after understanding a business requirement for a data analysis report?
Which of the following should be accomplished NEXT after understanding a business requirement for a data analysis report?A . Rephrase the business requirement.B . Determine the data necessary for the analysis.C . Build a mock dashboard/presentation layout.D . Perform exploratory data analysis.View AnswerAnswer: B Explanation: Exploratory data analysis (EDA) is...
Which of the following is a control measure for preventing a data breach?
Which of the following is a control measure for preventing a data breach?A . Data transmissionB . Data attributionC . Data retentionD . Data encryptionView AnswerAnswer: D Explanation: This is because data encryption is a type of control measure that prevents a data breach, which is an unauthorized or illegal...
Which of the following statistical methods requires two or more categorical variables?
Which of the following statistical methods requires two or more categorical variables?A . Simple linear regressionB . Chi-squared testC . Z-testD . Two-sample t-testView AnswerAnswer: B Explanation: This is because a chi-squared test is a type of statistical method that tests the association or independence between two or more categorical...
