Two Ways to Obtaining a Random Sample
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Two Ways to Obtaining a Random Sample
1- What is a random sample? Name two ways to obtain a random sample?
2- In a Gallup poll of 1,059 randomly selected adults, 39% answered “yes” when asked “Do you have a gun in your home?” Identify the sample, population and variable. Find the statistic and assign a symbol to it. Also describe what the parameter would represent in this problem and assign a symbol to it.
3- A sample of 50 employees at a company is selected, and the average is found to be 37 years. Identify the sample, population and variable. Find the statistic and assign a symbol to it. Also describe what the parameter would represent in this problem and assign a symbol to it.
4- What is the difference between quantitative and qualitative data? Give an example for each that was not discussed in class.
5- Is the “number of freshmen entering college in 2007” discrete or continuous? Explain
6-A marketing firm does a survey to find out how many people use a product. Of the one hundred people contacted, fifteen said they use the product. Is this an experiment or observational study? Explain
What do fine and course grained versions of the same rock type such as basalt and gabbro tell you about their origins?
What kind of rock is this and how did it form? “Granite type”
In general, there are 3 types of volcanic rock (basalt, andesite and rhyolite) that correspond to three different plate tectonic settings. What are these settings?
Magnetic and metamorphic rocks often look similar but have quite different origins. What is the major difference?
What is intraplate and interplate volcanism?
Why do basaltic and andesitic magma/lava differ so greatly in their degree of danger?
What plate tectonic phases are related to basaltic, andesitic and rhyolitic lava?
Is the depth of earthquake foci the same all over the world?
Which type of seismic waves can be distinguished and which are the most destructive?
How are plate tectonics, volcanoes and earthquakes related?
During a hike you find an igneous rock, it’s dark in color and has a fine granular appearance with small, fairly round crystals of a glassy, deep green material. What is this small, rounded, glass green crystals likely to be? DId the magma from which this rock formed likely originate in the mantle or in the crust, how? Was the magma likely a very high temperature magma or low, why? What other minerals might make up the rest of this rock?
In which environment (spit, lake, beach, sand dunes, alluvial fans, glacial deposits, swamp, delta, reef, barrier island, estuary, deep sea fans. turbity current, lagoon, or flood plain) would you find: A deposit consisting of several beds in which sediment size in each bed decrease from bottom to top, an evaporate deposit, a well-sorted sand deposit and a deposit that includes a high percentage of partially decomposed plant material.
You see an outcrop of sandstone. It’s poorly sorted and rich in feldspar and quartz. The sediment is derived from two sites in the area. Which site would it mostly come from? Site 1: nearby exposure of weathered basaltic lava flows or Site 2: outcrop of granite at the previous field trip stops up the road.
Two Ways to Obtaining a Random Sample
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Excellent Quality
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Introduction 45-41 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Literature Support
91-84 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Methodology
58-53 points
Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met.
Average Score
50-85%
40-38 points
More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided.
83-76 points
Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration.
52-49 points
Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met.
Poor Quality
0-45%
37-1 points
The background and/or significance are missing. No search history information is provided.
75-1 points
Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration.
48-1 points
There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met
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