TAMU STAT 303 - ReviewI (7 pages)

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ReviewI



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ReviewI

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Pages:
7
School:
Texas A&M University
Course:
Stat 303 - Statistical Methods
Statistical Methods Documents

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Stat303 Statistical Methods Review for Exam I 07 14 2009 Instructor Anh Dao 1 Boxplots are the best numeric graphs that we have discussed for A determining if there are outliers B comparing distributions C finding the mean D All of the above are true E Only two of the above are true 2 Suppose you are trying to see if there is a linear relationship between the two numerical variables X and Y You find that the correlation r 0 006 or R 0 006 What can be concluded from this A There is no linear relationship between X and Y B There is a strong linear relationship between X and Y C X and Y are the same variable D There may or may not be a linear relationship between X and Y You would need to see a scatterplot before coming to a conclusion about the relationship between X and Y E None of the above 3 Suppose your z score for this exam is 0 This means A You didn t miss any questions B You made the average score C The distribution of the scores is normal D Two of the above are true E None of the above are true 4 Suppose you know that the data you have is normal in shape and the mean 30 and the standard deviation 5 Which of the following would you also know A The minimum would be about 15 B The IQR would be less than 5 C The 95th percentile would be more than 40 D All of the above are true E Only two of the above are true 5 Figure 1 shows a discrete variable histogram and the numbers at the bottom indicate the values within the bins to the right Which of the following is true 1 2 Review for Exam I A The median is 4 and since the data is skewed to the right the mean is more than 4 B The median is 3 and since the data is skewed to the right the mean is more than 3 C The median is 4 and since the data is skewed to the left the mean is more than 4 D The mean is 4 and since the data is skewed to the right the median is more than 4 E The median is 3 and since the data is skewed to the left the mean is more than 3 Figure 1 Histogram 6 Again referring to the histogram which of the



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