A standardized exam's scores are normally distributed. In a recent year, the mean test score was 20.5 and the standard deviation was 5.4. The test scores of four students random are 13, 23, 7, and 34. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 13 is__ (Round to two decimal places as needed.) The z-score for 23 is__ (Round to two decimal places as needed.) The z-score for 7 is__ (Round to two decimal places as needed.) The z-score for 34 is__ (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The unusual value(s) is/are (Use a comma to separate answers as needed.) O B. None of the values ar
A standardized exam's scores are
The z-score for 13 is__
(Round to two decimal places as needed.)
The z-score for 23 is__
(Round to two decimal places as needed.)
The z-score for 7 is__
(Round to two decimal places as needed.)
The z-score for 34 is__
(Round to two decimal places as needed.)
Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice.
O A. The unusual value(s) is/are
(Use a comma to separate answers as needed.)
O B. None of the values are unusual.
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