Quiz1 - STA 2023 - Quiz 1 / Summer A 2011 May 18th, 2011...

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STA 2023 - Quiz 1 / Summer A 2011 May 18th, 2011 There will NOT be any partial credit for the multiple choice questions. Good luck! Name: UFID: Each question is worth the same. 1. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What percent of people have an IQ of 130 or greater? (a) 0.15 % (b) 2.5 % (c) 5 % (d) 10 % 2. Suppose X represents the money paid in dollars for a hotdog. What type of variable is X? (a) Categorical (b) Discrete quantitative (c) Continuously quantitative (d) Cannot be determined 3. Suppose the variance of the variable X from question 2 is 0.45. What is the standard deviation of X? (a) 0.45 dollars (b) 0.45 dollars 2 (c) 0.67 dollars (d) 0.67 dollars 2 1
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4. Which of the following must be true if the standard deviation of a dataset is equal to 0? (a) All elements in the dataset are identical (b) The variance is greater than 0 (c) The mean is 0 (d) This is not possible 5. Calculate the IQR of the following dataset: 2 5 7 8 11 (a) 6
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This note was uploaded on 12/15/2011 for the course STA 2023 taught by Professor Ripol during the Spring '08 term at University of Florida.

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Quiz1 - STA 2023 - Quiz 1 / Summer A 2011 May 18th, 2011...

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