Which best describes the relationship between training hours and error rate?

An online bookstore tracks the shipping cost for orders sent to different regions:  $3.95, $5.20, $7.15, $4.10, $6.80. What is the range in shipping costs? (Don’t include a dollar sign.)

A customer service manager is tracking the number of support tickets submitted daily for the past three months. They want to identify any trends to help with staffing decisions. Which chart would be most appropriate?

A housing analyst is reviewing and cleaning sales data using this code. What number will this code print?

A beverage company wants to understand how much soda customers consume weekly. They randomly sample 1,000 people from across the U.S. The average consumption is 3.2 liters. Another random sample gives an average of 2.8 liters. What best explains this difference?

A company surveys 25 customers and wants to calculate a confidence interval for the average satisfaction score using bootstrapping. How many values should be in each resampled dataset?

A hotel chain uses historical booking data to create a dashboard showing occupancy rates for each month over the past three years. In this case, what type of analytics is being used?

An operations director needs to report a single metric: average order fulfillment time in hours. What visualization would be most appropriate?

An analyst wants to ensure the number 20 is treated as a string instead of an integer. What code correctly stores this value as a string?

What is an example of a data cleaning task?