Mid-Term Practice

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View Attempt 1 of unlimited Title: MTH 316 Mid-Term Practice Started: October 5, 2010 10:24 AM Submitted: October 5, 2010 12:18 PM Time spent: 01:53:57 Total score: 32/40 = 80% Total score adjusted by 0.0 Maximum possible score: 40 1. Define: statistic Student Response Value Correct Answer Feedback 1. A statistic is a numerical measurement describing an aspect from a population. 0% 2. A statistic is quantitative measurement. 0% 3. A statistic is qualitative measurement. 0% 4. A statistic is a numerical measurement describing an aspect from a sample. 100% 5. A statistic is a numerical measurement that may vary. 0% Score: 0/1 Comments: 2. Identify the variable in the information below. USA Today reported that 44.9% of those surveyed (1261 adults) ate in a fast-food restaurant from one to three times each week. Student Response Value Correct Answer Feedback 1. response regarding frequency of eating at 100% View Attempt http://webctap.gardner-webb.edu/webct/urw/lc9821263... 1 of 19 10/5/2010 12:18 PM

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at fast-food restaurants 2. adults surveyed 0% 3. fast-food restaurant as well as response regarding frequency of eating at fast-food restaurants 0% 4. fast-food restaurants 0% 5. none of these choices 0% Score: 1/1 Comments: 3. Identify whether the variable in the information below is qualitative or quantitative. The archeological site of Tara is more than 4000 years old. Tradition states that Tara was the seat of the high kings of Ireland, because of its archeological importance, Tara has received extensive study (Reference Tara: an Archeological survey by Conor Newman, Royal Irish Academy, Dublin). Suppose an archeologist wants to estimate the density of ferromagnetic artifacts in the Tara region. For this purpose, a random sample of 55 plots, each of size 100 square meters, is used. The number of ferromagnetic artifacts for each plot is determined. Student Response Value Correct Answer Feedback 1. Information does not have any variable. 0% 2. qualitative 0% 3. quantitative 100% 4. qualitative as well as quantitative 0% 5. neither qualitative nor quantitative 0% Score: 1/1 Comments: 4. View Attempt http://webctap.gardner-webb.edu/webct/urw/lc9821263... 2 of 19 10/5/2010 12:18 PM
Identify the implied population in the information below. USA today reported that 44.9% of those surveyed (1261 adults) ate in fast-food restaurant from one to three times each week. The variable in this information is response regarding frequency of eating at fast-food restaurants. Student Response Value Correct Answer Feedback 1. all fast-food restaurants in the US 0% 2. none of these choices 0% 3. response regarding frequency of eating at fast food restaurants 0% 4. responses for all adults in the US 100% 5. responses for some of the adults in the US 0% Score: 1/1 Comments: 5. Consider the students in your statistics class as the population and suppose they are seated in five rows of 7 students each. To select a sample, you toss a coin. If it comes up heads, you use the 21 students sitting in the first three rows as your sample. If it comes up tails, you use 21 students sitting in last three rows as your sample.

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