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The scores on a standardized test are normally distributed with a mean of 500 and a standard deviation of 100. 1.  A student scores 650 on the test. What is their z-score?2.  Another student has a z-score of -1.5. What is their actual test score?3.  Explain what the z-score tells you about a student’s performance relative to the rest of the group.  

(2 points) Which statement best describes what the operator `%%` do in R?

(2 points) The use of dummy variables in statistical analysis allows for:

(2 points) Which type of variable is defined by the ability to rank order its values?

(2 points) A teacher records the test scores of 100 students ranging from 35 to 98. Instead of listing each individual score, the teacher groups them into intervals such as 30-40, 41-50, and so on. What is the primary reason for grouping the data this way?

(2 points) What does the power of a test (1 – beta) represent?

(2 points) In statistical analysis, what is described by the term “statistic”?

Why do manufacturing companies set production goals?

When are analytical procedures performed during an audit?

Which inventory-related internal control focuses on safeguarding physical inventory?