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Unformatted text preview: Self Assessment for Chapter 3 1 1. Click on “Begin Assessment” button. 2. Scroll down to begin quiz. Self Assessment for Chapter 3 2 1. Which one of the following quantities would give us information about a sample? μ σ ¯ x Self Assessment for Chapter 3 3 2. Which one of the following is a false statement about density curves? Always on or above the xaxis. Area under the curve within an interval is the pro portion of values expected in that interval. Total area under the curve depends on the shape of the curve. The median divides the area under the curve in half. The mean is the balancing point of the density curve. Self Assessment for Chapter 3 4 3. Look at the following density curve. Which would be larger: the median ( M ) or the mean ( μ )? 5 10 15 20 25 30 0.00 0.05 0.10 0.15 M would be larger than μ . M would be smaller than μ . They would be equal. Self Assessment for Chapter 3 5 4. Which one of the following is a false statement about the standard normal distribution? The mean is greater than the median. It is symmetric. It is bellshaped. It has one peak. Self Assessment for Chapter 3 6 5. If you knew that the μ = 0 and σ = 3, which density curve would match this data?105 5 10 0.0 0.1 0.2 0.3 0.4 Dataset 1105 5 10 0.00 0.02 0.04 0.06 0.08 0.10 0.12 Dataset 2 Dataset 1 Dataset 2 Self Assessment for Chapter 3 7 6. Attendance at a university’s basketball games follows a normal distribution with mean μ = 8 , 000 and stan dard deviation σ = 1 , 000. Estimate the percentage of games that have between 7,000 to 10,000 people in attendance. Use the 68–95–99.7 rule and give your answer as a percent. 7. Which one of the following is a false statement about the standard normal curve? Its standard devation σ can vary with different datasets. It is bellshaped. It is symmetric around 0....
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This note was uploaded on 02/12/2010 for the course STAT 221 taught by Professor Collings during the Winter '08 term at BYU.
 Winter '08
 Collings
 Statistics

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