A standardized exam's scores are normally distributed. In a recent year, the mean test score was...

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A standardized exams scores are normally distributed. In a recent year, the mean test score was 1479 and the standard deviation was 316. The test scores of four students selected at random are 1880, 1220, 2180, and 1380. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1880 is Round to two decimal places as needed.) The z-score for 1220 is (Round to two decimal places as needed) The z-score for 2180 is Round to two decimal places as needed.) The z-score for 1380 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) İslare O B. None of the values are unusual. (Use a comma to separate answers as needed.) Click to select your answerls)

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Gwendhaf mean (カテ1479 316 stan daud deuiahau and Jive den Valbes ave u79- 188o 3 (6 I. 2689 316 (22O iS tk 79-1220 2s9 る16 Th 2. 2 lu79-1380 311 7 9 31 6 스 2 : 0-31 z-value which are less thw -2 or more than t are alcd Uose o gives us vnosval value al -2.22

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