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Owner: crussell6
Created: Feb 15, 2018
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Lab 2- Courtney Russell
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1. Tell us which graph for your homework you found the most useful. Why? Address each graph and indicate what you found useful or lacking in each one.

I think that the Histrogram was the most useful graph. The data is easier to read and it is also easier to see the distribution of grades. The stem and leaf plot was useful in displaying the distribution, but I do not think it was as easy to read when compared to the Histogram. The dotplot did not show me quite as much of a difference in grade scores as the Histogram did, but I liked the it displayed the outliers more effectively. The boxplot also did a nice job of displaying the outliers and the distribution of the data, but the Histogram is easier for me to understand.

 

2. What is the shape of the Histogram? Is the shape something you expected (or would expect) for Homework grades? Why or why not? Do you think every college class has the same distribution? Why or why not?

The shape of the Histogram is skewed left. I definitely expected it to be skewed in this direction because this early in the semester you have a lot of students who are keeping up on there assignments and a few students that fall behind early on. I do not think that every college class will have the same distribution because some classes are far more challenging while some are fairly easy; it all depends on the subject.

 

3. Do not complete.

 

4. Lastly, calculate your z-score for your homework. You may use your current average homework score, as listed in MyStatLab. Type the full calculation, with the values you used, for full credit. 

(x) 90.67- (mean) 84.95= 5.72

5.72 / (standard deviation) 22.10= 0.2588

My z- score is 0.2588

 

5. What does your z-score mean? Are you satisfied with your z-score? Why or why not?

My z-score means that I am 0.2588 standard deviations above the mean homework score for the class. I am satisfied with this z-score because I am above the mean and also have maintained a good homework grade thus far.

Result 1: Histogram- Courtney Russell   [Info]
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Result 2: Stem and Leaf Plot- Courtney Russell   [Info]
Variable: Homework

Decimal point is 1 digit(s) to the right of the colon.
Leaf unit = 1
 0 : 8
 1 : 3
 1 : 
 2 : 
 2 : 
 3 : 
 3 : 
 4 : 
 4 : 
 5 : 1
 5 : 
 6 : 4
 6 : 
 7 : 34
 7 : 
 8 : 02222
 8 : 6999
 9 : 02344
 9 : 67888899
10 : 000000

Result 3: Dotplot- Courtney Russell   [Info]
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Result 4: Boxplot- Courtney Russell   [Info]
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Result 5: Summary Stats- Courtney Russell   [Info]
Summary statistics:
ColumnnMinQ1MedianQ3MaxIQRMeanStd. dev.
Homework347.5582.0892.34598.1399.9416.0584.94558822.103245

HTML link:
<A href="https://www.statcrunch.com/5.0/viewreport.php?reportid=76021">Lab 2- Courtney Russell</A>

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By pignottia
Apr 15, 2018

Great work.
Graded.

Always Learning