UT Knoxville STAT 201 - Practice Exam 1 - SP11 (12 pages)

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Practice Exam 1 - SP11



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Practice Exam 1 - SP11

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Pages:
12
School:
University of Tennessee
Course:
Stat 201 - Introduction to Statistics
Introduction to Statistics Documents

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1 3 Points One of the following statements is incorrect Which one is it Circle the incorrect statement a b c d e 2 One should summarize the spread of a skewed distribution with the IQR For a left skewed distribution the mean is smaller than the median For a right skewed distribution the mean is larger than the median The mean is a resistant measure of the center of a distribution A histogram displaying a uniform distribution will have no clear mode Consider the following small data set 3 9 4 11 2 0 These data were analyzed in JMP and the following output was produced Use the data set and or the JMP output to help you calculate the following quantities i 3 Points Mean ii 3 Points Median iii 3 Points IQR iv 3 Points s2 2 3 6 Points Research exists that states that the darker a person s hair color the higher their IQ Five people are selected with 5 different hair colors and given an IQ test The results are displayed in the scatterplot below Does the scatterplot pass the three correlation conditions List each condition and briefly comment on whether or not the condition is met 4 7 Points In the cells above each column indicate whether each column represents an identifier variable I a categorical variable C or a quantitative variable Q SS Number Gender 111 11 1111 999 00 0000 123 45 6789 987 65 4321 1 1 2 1 Gross Income 44123 18242 77146 52171 State County Zip Code Age TN WV CA PA Knox Kanawha Lassen Adams 37920 25306 96109 17316 37 22 61 28 3 5 A group of 17 graduate students volunteered to participate in a study to determine the impact that beer consumption has on Blood Alcohol Content BAC The data are displayed in the following scatterplot 0 2 0 15 0 1 0 05 0 0 1 2 3 4 5 6 7 8 9 10 Beers i 2 Points The direction of the relationship between number of beers and BAC is Circle the best answer Non existent negative positive ii 2 Points Circle the point on the scatterplot that represents the person that had 3 beers and a BAC of 0 14 iii 2 Points The correlation coefficient



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