1) Yes, our true value for the density of copper fell within the confidence interval we calculated for both the 90 and 95 percent. I believe the significance of the confidence interval is that we can say that we are 95% confident that the acutal value will be within the calculated range (plus or minus) of our experimental value.
2) the interval should increase as the the confident level increases closer to 100% because the higher the percentage of your confidence, the larger the range should be. In order for you to be more confident, you give yourself a larger range in which to be accurate.
3) Human error has a small effect on graphical results because the best fit line looks at the overall data but data could potentially shift due to human error if the error is great enough to shift the line, making the overall slope and intercept inaccurate. The effects of human error would be larger on numbers that are averaged.
4) The power output we calculated for the light bulb was 45.44 lumens.
5) In my classroom I have not yet explored blogs or google docs but I look forward to exploring how they can function to improve my classroom. I have used a lot of excel and lab quests in order to show students the technology as well as prepare them for future science classes/careers that now days are largely technology based.
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