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Suppose that you add 2 to all observations in a sample. How does this change the sample mean? How does it change the sample standard

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Suppose that you add 2 to all observations in a sample. How does this change the sample mean? How does it change the sample standard deviation? 0 This mean is increased by 1. The standard deviation is decreased by 2. O The mean is increased by . The standard deviation isn't changed. 0 The mean is increased by 1. The standard deviation isn't changed. 0 The mean is increased by 2. The standard deviation isn't changed. 0 The mean is increased by 2. The standard deviation is increased by 1. O The mean is increased by 2. The standard deviation is decreased by 2

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