Analyzing information
Páginas: 2 (491 palabras)
Publicado: 5 de abril de 2011
Valeria Carrillo
A00998809
Analyzing Information
1. - A frequency histogram of each of the semesters to be studied.
Highest value: 100
Lowest value: 26
Range: 74
74/9 = 8.2Highest value: 84
Lowest value: 65
Range: 19
19/7 = 2.71
Highest value: 97
Lowest value: 54
Range: 43
43/8= 3.37
2. – A graph bar of each of the semesters to be analyzed.3.- You’ll have to get the mean, median and mode of each of the semesters.
2009: 26, 48, 48, 65, 66, 66, 68, 68, 76, 77, 79, 80, 82, 83, 83, 84, 88, 88, 96, 100
Mean: 73.55
Median: 78
Mode:There is no mode.
2010: 65, 66, 70, 70, 70, 70, 70, 71, 71, 72, 72, 73, 74, 74, 76, 80, 81, 82, 84, 84
Mean: 73.75
Median: 72
Mode: 70
2011: 54, 59, 65, 71, 74, 76, 79, 84, 84, 85, 90, 92,92, 95, 97
Mean: 79.8
Median: 87.5
Mode: 84 and 94
4.- Get the variance and standard deviation for each year.
Variance: ơ²=∑(x-M)²N
Standard Deviation: ơ=√∑(x-M)²N
2009 2010 2011ơ²= 294.2475 ơ²= 30.1875 ơ²= 162.2933
ơ= 17.1536 ơ= 5.4943 ơ= 12.7394
With that information, answer the following questions.
* Which was the best year for Mr. Sloan’s class?I would say that the best year for Mr. Sloan’s class was year 2011 because the mean of the grades (almost 80) was the highest of the three years.
* Do you think that the data can bemisinterpreted? Why?
I don’t think that the data could be misinterpreted because every single grade for each student is expressed in the exact value.
* What do the measures of central tendency tell us?Measures of central tendency indicate us what was the average of grades (mean), which was the grade that was mostly repeated (mode) and which would be the midpoint with an increasing distribution of thegrades (median).
* If we take into account the standard deviation, is there a lot of variability among the grades in each year? Explain why.
Yes. It is noticeable that year 2010 has the lowest...
A00998809
Analyzing Information
1. - A frequency histogram of each of the semesters to be studied.
Highest value: 100
Lowest value: 26
Range: 74
74/9 = 8.2Highest value: 84
Lowest value: 65
Range: 19
19/7 = 2.71
Highest value: 97
Lowest value: 54
Range: 43
43/8= 3.37
2. – A graph bar of each of the semesters to be analyzed.3.- You’ll have to get the mean, median and mode of each of the semesters.
2009: 26, 48, 48, 65, 66, 66, 68, 68, 76, 77, 79, 80, 82, 83, 83, 84, 88, 88, 96, 100
Mean: 73.55
Median: 78
Mode:There is no mode.
2010: 65, 66, 70, 70, 70, 70, 70, 71, 71, 72, 72, 73, 74, 74, 76, 80, 81, 82, 84, 84
Mean: 73.75
Median: 72
Mode: 70
2011: 54, 59, 65, 71, 74, 76, 79, 84, 84, 85, 90, 92,92, 95, 97
Mean: 79.8
Median: 87.5
Mode: 84 and 94
4.- Get the variance and standard deviation for each year.
Variance: ơ²=∑(x-M)²N
Standard Deviation: ơ=√∑(x-M)²N
2009 2010 2011ơ²= 294.2475 ơ²= 30.1875 ơ²= 162.2933
ơ= 17.1536 ơ= 5.4943 ơ= 12.7394
With that information, answer the following questions.
* Which was the best year for Mr. Sloan’s class?I would say that the best year for Mr. Sloan’s class was year 2011 because the mean of the grades (almost 80) was the highest of the three years.
* Do you think that the data can bemisinterpreted? Why?
I don’t think that the data could be misinterpreted because every single grade for each student is expressed in the exact value.
* What do the measures of central tendency tell us?Measures of central tendency indicate us what was the average of grades (mean), which was the grade that was mostly repeated (mode) and which would be the midpoint with an increasing distribution of thegrades (median).
* If we take into account the standard deviation, is there a lot of variability among the grades in each year? Explain why.
Yes. It is noticeable that year 2010 has the lowest...
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