![]() ![]() You can run str(murders) in your R sandbox to see the structure of the murders data frame. Total: Number of gun murders in that state (2010) Population: State population, number of people in that state (2010) Here are some details about the data frame: (This data frame actually includes the District of Columbia, DC, as a "state.") They tracked total gun murders in each state. The data frame murders contains data collected by the FBI. (d) Using the Range Rule of Thumb, determine whether the student's score on either exam was significantly (unusually) low or significantly (unusually) high.įor questions 13-20, refer to the following data frame, and continue to add each red line of code into an R sandbox: (c) Relative to the students in each respective class, in which subject did this student do better? What is the student's standard score (-score)? ![]() (b) The same student scored 84 on the statistics final. ![]() What is the student's standard score (z-score)? (a) A student scored 81 on the chemistry final. The scores on the statistics final are also approximately normally distributed, with a mean of 80 and a standard deviation of 8. At a college, the scores on the chemistry final exam are approximately normally distributed, with a mean of 75 and a standard deviation of 12. ![]()
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