Midterm review - Today we spent a lot of time looking at p....

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Today we spent a lot of time looking at p. 62f. In this question we had to look at the double stem and leaf plot and compare it to the histogram on the same page. The differences between the two numerical representations is that the histogram is looking at the overall grouping of the groups because there is no exact measurements for each bar, they could range in size from 37.5-44.9, you don't know where any of the measurements actually fall in that span. In the stem-and-leaf plot they are grouped into intervals but they are easier to see where the range is. Like you know that 4/1=40.5-41.4 and there is one of those measurements, you know that there is one measurements in that range. It is a much smaller range and there isn't as much guessing of what the range is. We looked at the graphs on page 68 as well today. In order to find out how many left eyed right thumbed people there are out of that sample size you must have the data, fractions, in order to show the percentages. Without having the fractions/measurements than you wont be able to properly show the relationship. With these graphs and data we can only tell what it tends to be, we can't give a definite because there are others that are different and the opposite from the normal, to be exact all the information would have to be the same. Next we looked at p. 71 #4 and looked at making the contingency tables for the information provided. If you know the total and one other number out of the table than you would be able to figure out the rest of the information. You have to make sure make sure that all the information adds up at the end so that way you know that your information is correct. Having this information will help you construct contingency tables. Finally, we looked at p. 75a and the graph that we constructed out of our height and arm span information. We noticed that our data is clustered around an imaginary line and has a moderately strong positive slope. We know that it is a positive slop because it trends upward on the graph and it is clustered all around that imaginary line. If we had a lot of different points that were way off the norm than it wouldn't tend to be a positive slope. Having those close together than that means they are tending toward each other. AHE : p. 84 10-11, p 87-94 tasks 1-9 and read 94-95 Remember Midterm October 28th! 10/12/09 We sent our height, armspan, and navel height data through Navigator. We renamed the lists the data were sent in so that we could continue to use L1, L2, and L3. We were reminded NOT to use the text editor to create the lists with numerical subscripts as those are different lists than the default lists stored in the calculator of L1-L6, even though it is very hard to see that in the list editor. Dr. B thought that took too long so she needs to work on how to help us send data more efficiently. Probably give better directions next time. Some of us had to link our data as some glitches occurred so we were shown how to use the Link
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This note was uploaded on 03/10/2010 for the course MATH 2650 taught by Professor Browning during the Spring '10 term at Western Michigan.

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Midterm review - Today we spent a lot of time looking at p....

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