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STAT 1124 Mid Term 2 Model Answers

# STAT 1124 Mid Term 2 Model Answers - Page 1 STAT 1124...

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Unformatted text preview: Page 1 STAT 1124 Section 2 Name: Mid Term 2 Student ID: March 2, 2009 Model Answers You have 55 minutes to complete the test. Justify your answers in order to receive full credit The total number of points is 30 1. In a biological experiment, the following has been obtained: W 0.10 1.51 1.58 1.70 1.75 2.04 2.34 2.62 3.08 3.84 3.99 4.57 4.69 5.69 6.30 6.31 6.43 6.72 6.73 7.78 8.13 8.49 8.59 9.69 15.20 Mean 5.20 Std. Dev. 3.40 a) Use a graphical tool to summarize this data set. ( 2 points ) 2.19 4.69 7.26 15.2 0.1 Page 2 b) Provide two measures of variability of this data set ( 2 Points ) Standard deviation = 3.4 Range = 15.2 -0.1 = 15.1 c) Provide the five point summary of this data set ( 2 Points ) Minimum 0.10 Q1 2.19 Median 4.69 Q3 7.26 Maximum 15.2 d) Are there any outliers? ( 2 points ) Since 15.2 > 14.85, 15.2 is an outlier Since 0.1> -5.4 , 0.1 is not an outlier e) Describe the distribution of this data set ( 3 Points ) The distribution is skewed to right as the mean = 5.2 > 4.69. There is an outlier 15.2. f) If a new variable A is created by using the rule that if W is less than 3.5, then A = "No"; otherwise A = "Yes". What type of variable is A? (otherwise A = "Yes"....
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STAT 1124 Mid Term 2 Model Answers - Page 1 STAT 1124...

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