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STATISTICS:R

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STATISTICS:R What is R? - CORRECT ANSWER -R is a free and open-source programming language for statistical computing and graphics. Why learn R? - CORRECT ANSWER -R is built to handle and analyze data. What are the two types of data? - CORRECT ANSWER -Qualitative (Categorical) and Quantitative (Numeric). What is a numerical summary? - CORRECT ANSWER -A numerical summary provides an overview of data using measures of center and spread. What is the mean? - CORRECT ANSWER -The average of data values (sum of values divided by count). What is the median? - CORRECT ANSWER -The value at which half of the data lies above and half lies below it. How do you calculate the median for an odd number of observations? - CORRECT ANSWER -The median is the kth value where k = (n + 1)/2. How do you calculate the median for an even number of observations? - CORRECT ANSWER -The median is the mean of the kth and (k+1) terms, where k = n/2. What is an example calculation for mean and median? - CORRECT ANSWER -Given data: y = 1,3,3,7,9. Mean = 4.6, Median = 3. What functions can be used in R to calculate mean and median? - CORRECT ANSWER -mean() and median() functions. What does a measure of spread indicate? - CORRECT ANSWER -How far apart the values are

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