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Statistics Homework Solutions 2

# Statistics Homework Solutions 2 - 2 CHAPTER 1 Section 1.2 1...

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2 CHAPTER 1 Section 1.2 1. False 3. No. In the sample 1, 2, 4 the mean is 7/3, which does not appear at all. 5. The sample size can be any odd number. 7. Yes. If all the numbers in the list are the same, the standard deviation will equal 0. 9. The mean and standard deviation both increase by 5%. 11. The total number of points scored in the class of 30 students is 30 72 2160. The total number of points scored in the class of 40 students is 40 79 3160. The total number of points scored in both classes combined is 2160 3160 5320. There are 30 40 70 students in both classes combined. Therefore the mean score for the two classes combined is 5320 70 76. 13. (a) All would be multiplied by 2.54. (b) Not exactly the same, because the measurements would be a little different the second time.
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