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On a nationwide test taken by high school students, the mean score was 53 and the standard deviation was 13. The scores were normally distributed. Complete the following statements. (a) Approximately ? v of the students scored between 14 and 92. (b) Approximately 68% of the students scored between D and D . The numbers of trading cards owned by 7 middle-school students are given below. (Note that these are already ordered from least to greatest.) 161, 385, 389, 457, 521, 575, 627 Send data to calculator Suppose that the number 161 from this list changes to 350. Answer the following. (a) What happens to the mean? Q It decreases by D. Q It increases by I]. Q It stays the same. (b) What happens to the median? 0 It decreases by D Q It increases by D. Q It stays the same