Tuesday, April 19, 2011
Monday, April 18, 2011
Sunday, April 17, 2011
|Rungrado May Day (N.Korea)||150|
|Salt Lake (India)||120|
|Estadio Azteca (Mexico)||105 |
a) the mean
b) the variance
c) the standard deviation
460, 376, 424, 361, 318,
368, 478, 438, 383, 385,
363, 345, 361, 385, 386,
389, 332, 295, 280, 280
(Source: U.S. Bureau of Mines and U.S. Geological
Saturday, April 16, 2011
Price (Dollar) per Box
A) Simple Random Sample
B) Systematic Sample
C) Stratified Random Sample
D) Cluster Sample
Friday, April 15, 2011
Numbers of Fantasy Books Read (X):
Student 1: 3
Student 2: 1
Student 3: 3
Student 4: 9
Number of Biographies Read (Y):
Student 1: 4
Student 2: 4
Student 3: 8
Student 4: 8
Calculate the mean, median, mode, and standard deviation for each variable.
Calculate the covariance and correlation.
Claire V. Madill
Monday, April 4, 2011
Author: Jacques Steinburg
Publication Title: The Choice
Article Title: Stanford and Duke Accepted How Many? Colleges Report 2011 Admission Figures
Date: March 30, 2011
1. Jacques Steinburg
2. It is undisclosed who sponsored the survey.
3. Yes, I think whoever sponsored this survey wanted to see which colleges were more lenient in their decisions on accepting and also which colleges were harder to get into.
4. This study included the amount of applicants and of those applicants, they showed who was admitted.
5. The results are communicated very well, extremely easy to read and interpret.
6. The graph used in this article is very easy to read. I understood it the first time I looked at it.
Friday, April 1, 2011
Blog assignment #1
New York Times
Tweety Was Right: Cats Are a Bird’s No. 1 Enemy
By Elisabeth Rosenthal, March 20, 2011
1. The study was done by a few biologists and specialists in The Journal of Ornithology
2. The sponsor of this research is undisclosed
3. This sponsor was interested in finding out how disruptive cats can be to the natural environment, by killing baby gray catbirds.
4. It is not noted. However, it seems that the methodology includes a sample size of a certain number of catbirds’ deaths which were looked into to find the cause of this death. This is a random sample, there is not a control group.
5. These results are clearly communicated. 80% of the birds in the study were killed by predators. 47% of these predators were cats.
6. There are no graphs in this study.
Claire V. Madill
1) This article describes 2011 Indian census, which collected information regarding India’s population and classified the population according to gender, religion, education, and occupation. This survey was conducted by 2.7 million Indian census officials from India, who visited 670,000 towns and villages.
2) The sponsor of this research is obviously the government of India. The government of India conducted the survey on which all of the statistics in this article are based upon.
3) The government of India could have been interested in finding an highly optimistic number regarding the total population of India. India is a rising power, and its large population is one reason many believe it will become a main power in the international political and economic system. Overestimating the population makes India seem even stronger and larger and also makes India appear like more of a competitive threat to China.
This article also mentions statistics regarding the gender gap between girls and boys in India. The Indian government might be interested in underestimating the gap or providing evidence that the gap is closing. Such a finding would make it seem like India is advancing in the way of human rights, improving the India’s prestige and appearance.
4) Not much is mentioned on the methodology of the census. The article does mention the number of officials that conducted the census (about 2.7), the approximate number of towns (7,000) and villages (600,000), and outlined some of the challenges census officials faced (large area, diverse cultures, high levels of illiteracy, large homeless population).
5) Typical of many BBC News articles, the results are communicated in a clear informative manner. The information regarding total population and the statistics regarding gender gaps are straightforwardly written. A small sidebar within the article provides a easy way to review some of the main statistics.
6) One graph is included in the article. It is used in a clear informative manner. The graph has a clear title, “Falling number of girls born in India since 1961.” Both axis of the graphs are labeled, and the source is located right underneath the graph.
"India Census: Population Goes up to 1.21bn." BBC News. British Broadcasting Corporation, 31 Mar. 2011. Web. 31 Mar. 2011.