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Your team is analyzing product sales.  You observe some irregularities in the dataset (shown below). Which data cleaning step is most critical in this case?

An airline’s booking system has several reservations missing passenger passport numbers, even though these are required for international flights. What data quality dimension is being violated?

When handling missing values… Why might one choose to input data rather than remove rows?

What is an objective of data cleaning?

An airline collects sales data and adds weather conditions to see if weather influences cancellations. What type of transformation is this?

A restaurant is studying customer survey results. However, they only want to analyze responses from delivery customers, not dine-in customers. In this case, what’s the best transformation?

A technology company creates a data access policy based on the principle of least privilege. Which scenario shows the principle being violated?

Given the following 14 real estate prices: 114,950   158,000   230,500   230,500   387,000   389,950   479,000   488,800   529,000   575,000   639,000   659,000   1,095,000   5,500,000. Find the mean, median, mode, and the standard deviation.  

Consider the following signal flow graph and answer the following questions: The number of forward path(s) is/are [q71] One forward path gain is [q72] The number of closed loops [q73] One close loop gain is [q74]

A&W’s advertising focuses on their use of 100% beef raised without hormones or steroids in their hamburgers, a fact that seems to resonate positively with consumers. A&W are using a ______ positioning strategy.