WGU C207 OA 2023

WGU C207 OA 2023. By quantifying risk - Answer In what way does probability theory inform decision-making for managers? Ordinal data - Answer Which type of data are the Olympic medals of gold, silver, and bronze examples of? It reduces the amount of incomplete data. It cleans data. - Answer What are some of the aspects of data quality management? Choose 2 answers Missing data Misspelled data - Answer Which two attributes indicate potential data quality issues when evaluating a set of nominal data? Choose 2 answers Systematic error - Answer When conducting a study that measures an individual's weight, all scales are calibrated prior to use in measurement. Which type of error should this procedure significantly reduce? The response variable - Answer An advertising manager creates a research study by presenting low, medium, or high frequency of the same ad in matched markets. The manager then reports on sales in each market location. What is the term for the different sales in this study? Cohort study - Answer A healthcare study follows a particular sample over time to identify how the health habits of teenagers impact their likelihood of acquiring various diseases later in their life in the hope that the healthcare organization will be able to create early prevention programs. Which type of research design does this study describe? Systematic error Omission error - Answer Several missing values in a particular field in a dataset were observed. The likelihood of a record having a missing value is correlated to another variable in the dataset. Which two types of error might be introduced into the dataset if the removed record included missing values? Choose 2 answers Number of purchases per e-mail Cost per e-mail - Answer A company is trying to increase its online sales revenue by improving its e-mail advertising campaign for repeat customers as well as new customers. Which two variables would be used in determining a campaign to maximize revenue gain? Choose 2 answers Compare outcomes of different drug testing results ANOVA Understand effective marketing to spend advertising dollars efficiently Correlation Monitor production process Control charts - Answer Match each action with the appropriate statistical procedure. Answer options may be used more than once or not at all. (3) Confusion of association and causality - Answer A researcher concludes that bananas create healthy children because the researcher's notes indicate that children who eat a banana every day are healthy. Which misuse of statistics would this study be an example of if these children also eat a balanced diet and exercise daily? Does a causal relationship truly exist? - Answer In the month of December, there is a strong positive correlation between airline ticket sales and retail sales. Which question should the researcher consider before concluding that the correlation statistic implies that airline sales drive retail sales? Intersection Multiplication principle - Answer A medical care provider determines the probability that a patient needs treatment for a broken bone, the probability that a patient needs treatment for a concussion, and the probability that a patient needs treatment for both a broken bone and a concussion. Which two techniques apply in finding the probability that a patient needs treatment for a broken bone and a concussion? Choose 2 answers Bayes' Theorem - Answer A hardware store has found that there is a 0.25 probability that a customer buys an electrical product, a 0.45 probability that a customer buys a plumbing product, and a 0.10 probability that a customer buys an electrical part if they purchase a plumbing part. Given this information, which statistical rule can be used to determine the probability that a customer buys a plumbing product given that this customer has purchased an electrical product? 12 - Answer Given the following data set: 11 12 What is the mode? Scatterplot - Answer Which graphical tool is used to illustrate a possible relationship or correlation between two variables? The data point is two standard deviations less than the mean of the data set - Answer What does it mean when an individual data point has a z-score of -2? The advertisement was effective in building brand awareness. - Answer A research study examined the impact of product advertisement exposure on that product's brand awareness. The appropriate statistical test indicates that the null hypothesis should be rejected with 95% confidence. What can be concluded from this study? Median - Answer A manager is analyzing a dataset that includes information on individual incomes. The manager knows that the dataset is fairly representative of the general population and includes several millionaires. Based on this dataset, which measure of central tendency best represents the middle of the distribution? Standard deviation - Answer After evaluating manufacturing times for a particular product, a manager determines that the times are spread out across the distribution. WGU C207 OA 2018 The manager has been asked to determine how far, on average, the time is from the mean. Which statistic roughly measures the average distance of a data point from the mean of the distribution? 97.5% - Answer The number of customers that an automobile service shop receives on any given day is normally distributed with a mean of 75 and a standard deviation of 25. On a given day, 125 oil changes are performed. What is the probability on a given day of 125 or fewer oil changes performed? ANOVA - Answer A nonprofit organization ran an e-mail campaign with three different messages to solicit additional donations. What should the nonprofit organization use to determine if the average donation differs for the different messages? Standard deviation Mean - Answer A manager of a call center is in charge of creating a staffing plan. The number of calls received per day is normally distributed. Which two statistics would be needed in order to estimate the number of calls that would be received 95% of the time? Choose 2 answers picture of a hill - Answer A hospital gathers the blood pressure readings of a sample of patients. They find that mean, median and mode of this data set are all nearly equal and that 50% of the blood pressure readings are less than the mean and 50% are greater than the mean. Which histogram would correctly graph this data set? (hill) 68.2% - Answer A normally distributed data set has a mean of 10 and a standard deviation of 2. What is the probability that a randomly selected event from the data set will be between 8 and 12? The dependent variable - Answer A manager uses a linear regression to examine how the store's retail sales are predicted by advertising expenditures. WGU C207 OA 2018 What will retail sales represent in this regression? Sales of $45,432 - Answer An analyst used multiple linear regression to explore how Store A's sales ( y) are predicted by Store A's advertising expenditure dollars (variable x1) and the advertising expenditure dollars of Store A's competitor (variable x2). The estimated regression is y = 532 + 80.5 x1 - 35.6 x2. Which scenario would be predicted if x1 is $1,000 and x2 is also $1,000? R-squared - Answer A company decides to auction excess inventory on an auction website. They have performed a regression analysis to identify how the length of the auction impacts the final price. Which statistic indicates the strength of the relationship between the length of auctions and final price?