WGU C207 STUDY GUIDE MODULE 1 & 2 LATEST 2023 GRADED A

WGU C207 STUDY GUIDE MODULE 1 & 2 LATEST 2023 GRADED A Analytics is the discovery, analysis and communication of meaningful patterns in data information bias is a prejudice in data that results when either the respondent or the interviewer have & agenda that affects responses ordinal data places data into categories that are ordered by a predetermined criteria interval data is numerical data that is ordered, is equal distance apart & does not have a natural zero reliable data is consistent & repeatable random error represents errors in data caused by unpredictable statistical fluctuations nominal data places data into "either or" categories or identifies by name or charachteristics data management includes cleaning & storage of collected data big data is a massive amount of data that is difficult to process using traditional database & software techniques ratio data is numerical data that has a natural zero allowing this data to be added, subtracted, multiplied & divided measurement bias is a prejudice in data that results when the sample is not representative of the population be tested Why is quantitative analysis & analytics important in decision making? (Choose 3) Decisions are less subjective, analytics can be explanatory , managers can build predictive models Sales for Northern region are expected to decrease 2% in the next fiscal year. Predictive analysis The median household income for New York City from is Descriptive analysis Alternating two trains between 5 pm & 7 pm will increase on time arrivals Prescriptive analysis The largest consumer group of the product is female descriptive analysis Employee turnover for the organization will be more than 5% Predictive analysis Increasing the ratio of ingredient A to ingredient B o 1:15 will yield more product Prescriptive analysis Stage 1 of Davenport-Kim Three-stage Model includes which two of the following steps? Review of previous findings & problem recognition Stage 2 of Davenport-Kim Three stage Model includes which two of the following steps? Solve the problem & data collection Which data type is types of cars produced in a factory? Nominal Which data type is distance between each process step measured in inches? Ratio Which data type is the age group of survey participants? Ordinal What type of data is a pain scale (example:1-10)? Interval What type of data re women's dress sizes Interval (dress) What type of data is the age of each participant in a survey? ratio (participant) What type of data are sales total for the day in dollars? Ratio Select the elements of an experimental study: (Choose 3) Responses, treatments, experimental units This bias occurs if the sample is not randomized measurement When an instrument produces a consistent output it is: Reliable This type of error will cancel itself out over a large # of measurements Random The use of a placebo that is known by the treatment allocater or researcher is considered a(n): blind study cleaning &storing collected data is data management which of the following statistics are unaffected by a single large outlier?(more than one) Media, Interquartile range, mode Which of the following is most suitable for policy making based on income distribution? Median If we study data from a population whose mean is 200 & standard deviation is 30, which of the following data points has a z-score of -3? 110 Which of the following statistics measures the spread of the dataset away from the mean? variance Which of the following are measure of spread or variability of a dataset? (more than one) IQR, Range, Variance An experiment consists of rolling a die & flipping a coin. Which two choices below best apply for computing the probability of rolling a 6 on a die "&" flipping head on a coin? Multiplication & intersection An experiments consists of rolling a die & flipping a coin. which two choices below best apply for computing the probability of rolling a 6 on a die "OR" flipping a head on a coin? Addition & union The probability that a baby is a girl, given that the baby is wearing pink is 0.8. The probability that a baby is a girl is 0.5. Which of the choices below best applies for determining the probability that a baby is wearing pink GIVEN THAT the baby is a girl? Bayes A government official noticed that Total US Highway Fatality Rate was strongly correlated to lemons imported. Before concluding that the more lemons we import the lower the fatality rate what is the main issue should the official think about here? Is there a casual relationship? For the scatter diagram below, which of the following describes the correlation? Strong Negative We examine a population with normal distribution having mean 1,000 & standard deviation 50. What percentage of the population lies between 850 & 1150? 99.7% We examine a population with normal distribution having mean 1,000 & standard deviation 50. What percentage of the population lies between 900 & 1100? 95% We examine a population with normal distribution having mean 1,000 & standard deviation 50. What percentage of the population lies between 950 & 1050? 68% How are Z-scores from a population with normal distribution distributed? Normal distribution with mean 0 standard deviation1 If we need to examine the relationship age & salary which of the following would be most useful? Scatter plot Consider a population with mean 100 & standard deviation of 10. if we randomly select a data point from the population what is the probability that the point will be between 90 & 110 ? (Hint: consider the z-scores) 68% A gym owner wants to know the TYPICAL time a patron spends at the gym. What is the best statistic to consider? Mode What z-score should be used to find the 95% confidence interval? 1.96 What z-score should be used to find the 99% confidence interval? 2.575 For the box plots above, which experiment has the lowest median? 5 Which box plot has the smallest interquartile range? 5 Excluding outliers, which experiment has the lowest point? 4