1. Did the true value for density fall within the confidence interval? What is the significance of the confidence interval with respect your experimentally measured density and the true value of density?
2. Does the interval increase or decrease and as the confidence level changes from 90 to 95 to 99% and is the change intuitive? Could you explain the change to your students conceptually?
3. The procedure for measuring density for the liquid used a graphical approach as opposed to our three trials and average method for determining the density of the solid. If you made a determinant (human) error for your first measurement in the liquid density portion, would this error plague or affect the subsequent measurements? (try to think of a situation where it would not and a situation where it would).
2 comments:
Did the true value for density fall within the confidence interval? What is the significance of the confidence interval with respect your experimentally measured density and the true value of density? Yes, Our confidence level was so large included most of the metals. The closer your experimental value is to the true value the smaller the confidence level.
2. Does the interval increase or decrease and as the confidence level changes from 90 to 95 to 99% and is the change intuitive? Could you explain the change to your students conceptually?
Increases, because it wants to include more values as the percentage increases. It would be hard for my students to conceptualize this idea.
3. The procedure for measuring density for the liquid used a graphical approach as opposed to our three trials and average method for determining the density of the solid. If you made a determinant (human) error for your first measurement in the liquid density portion, would this error plague or affect the subsequent measurements? (try to think of a situation where it would not and a situation where it would).
If you build upon this initial error it would cause an increase of error. The more samples that are correct will minimalize this error.
Johnny Olson's Answers to Day 1 Questions
1. Did the true value for density fall within the confidence interval? What is the significance of the confidence interval with respect your experimentally measured density and the true value of density?
Yes, the true value for density fell within the confidence interval.
The closer the experimental value is to the true value, the smaller the confidence interval is going to be. Opposite of that, the farther away the experimental value is to the true value, the bigger the confidence interval is going to be.
2. Does the interval increase or decrease and as the confidence level changes from 90 to 95 to 99% and is the change intuitive? Could you explain the change to your students conceptually?
As the confidence level changes from 90% to 95% to 99%, the confidence intervals should increase. The reason the intervals increase is because each higher confidence level will need to include more values. Therefore, as the level goes up, the number of different values in the interval goes up, so the interval needs to increase.
3. The procedure for measuring density for the liquid used a graphical approach as opposed to our three trials and average method for determining the density of the solid. If you made a determinant (human) error for your first measurement in the liquid density portion, would this error plague or affect the subsequent measurements? (try to think of a situation where it would not and a situation where it would).
If the mistake made on the first measurement is made on the subsequent measurements, then all of the values will be off by the same amount. Therefore, if the mistake is caught, it should be able to be fixed.
If the mistake made on the first measurement is not made on the subsequent measurements, the values will be off by different amounts. This would be harder to fix. The measurements might have to be redone.
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