WGU C207 DATA-DRIVEN DECISION MAKING FINAL PRE ASSESSMENT QUESTIONS AND ANSWERS 2023

WGU C207 DATA-DRIVEN DECISION MAKING FINAL PRE ASSESSMENT QUESTIONS AND ANSWERS 2023. An online retailer selling workout apparel has a large increase in sales during December and declares that their weekly newspaper ad resulted in higher sales. What misuse of statistics may the retailer have used in making this decision? (correct answers)Association and Causation An educator collects eighth grade math scores from a local school and used this data to recommend curriculum changes for grades 8 - 12. What misuse of statistics may the educator have used in making this recommendation? (correct answers)Not a representative sample An economist wishes to study the distribution of household income in a Midwestern city. He randomly selects a sample from 12 households. He notices two large incomes in his sample. Which measure best represents the middle of the incomes? (correct answers)Median A cable company offers its customers both cable television and internet. What statistical rule should be used to determine the probability that customers will have both cable television and internet? (correct answers)Multiplication A department store is considering a new credit policy to reduce defaults on payments. Its records show that 95% of defaults have at least 2 late payments. Also, 3% of all customers default and 30% of those customers who have not defaulted have a least 2 late payments. What statistical rule should be used to find the probability that a customer will default given that at least 2 payments were late? (correct answers)Bayes Theorem Based on quality checks at plastic bags manufacturer, the breaking strength of their bags has a mean of 50.5 and a standard deviation of 1.6. A customer's test of the bags finds bag strength of 54.2 or less. Which statistical measure should be used to help determine the probability of the customer's test occurring? (correct answers)z-score The mean of 100 bank customers' waiting times for teller service is 5.8 minutes with a standard deviation of 1.5. What time range would represent a 95.4% probability customer waiting time? (correct answers)2.8 to 8.8