Covartiation: change in one and change in the other‚ will the two move together. Nonspurioussness: no alternative example. Mean- use when #’s are in interval and no outliers. Median-not sensitive to outliers‚ useful in ordinal- only captures small amount of information about the sample. Mode- the most frequent # will work with nominal‚ ordinal or interval. Positively skewed data- is positively skewed because most of the scores tend to cluster toward the lower end of the scale with increasingly fewer
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SSx= ∑ x2- (∑ x)2/n SSxy= ∑ xy- ∑ x*∑ y/n 3. Sample Y Intercept 4. Coeff. Of Determination 5. Std. Error of Estimate 6. Standard Error of 0 and 1 7. Test Statistic 8. Confidence Interval of 0 and 1 9. Confidence interval for mean value of Y given x 10. Prediction interval for a randomly chosen value of Y given x 11. Coeff. of Correlation 12. Adjusted R2 13. Variance Inflation Factor 14. Beta Weights 15. Partial F Test SSER
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Question: (Case 1-1 Google‚ Inc.) Where is the company most vulnerable‚ from a communications standpoint? Answer: Introduction To be a major competitor within the world of computer science and technology‚ you have to be innovative‚ creative‚ and crafty. Two of Stanford University’s very own doctoral computer science students‚ understood this idea all too well. Sergey Brin and Larry Page‚ cofounders of Google Inc. went on to do just that‚ by creating a web “search engine” that delivered
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were randomly and independently chosen from the populations‚ population distributions are normal for each group; and population variances are equal for all groups. The assumptions of ANOVA are identical to the t-test and the calculated statistic is called an F-value which has a probability value associated with it. As with the t-test‚ if our probability value is less than 0.05 we reject our null hypothesis (in this case that there is no difference among the treatment groups). This p-value
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Abstract Mars Inc. is one of the worlds’ leading snack food companies‚ but people are becoming more aware of the health risks associated with eating a steady supply of candy. Recommendations to add alternatives in products‚ and researching ways to make existing products more health minded would be essential to appeasing the consumers‚ and in guarantee that profits will not suffer. The Problem Mars Inc. is one of the largest confectionary businesses in the world. Products of Mars Inc. products
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Definition Statistics - science of collecting‚ organizing‚ summarizing and analyzing information to draw conclusion or answer questions. - Provides a measure of confidence in any conclusion Population - the collection of all of the people or objects that one considers Individual - a single person of object of the population Sample - a subject of the population (a group of individual of the population) Descriptive statistics - describes data through numerical summaries
Free Scientific method Measurement Level of measurement
independent observations by the number of observations in the group that represent one of two outcomes. For example‚ the proportion of individuals in a random sample who support one of two political candidates fits this description. In this case‚ the statistic is thecount X of voters who support the candidate divided by the total number of individuals in the group n. This provides an estimate of the parameter p‚ the proportion of individuals who support the candidate in the entire population. The binomial
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and intervals? 2. How to calculate class intervals? 3. What are frequency and frequency table? 4. What are histograms? How is it different from bar graph? 5. How do we understand and construct a histogram? 6. What is a frequency polygon? 7. What is cumulative frequency? 8. What are quartiles and percentiles? 9. How do we graph and read ogive? Web Resources CLASS LIMITS‚ BOUNDARIES AND INTERVALS http://wizznotes.com/mathematics/statistics/class-limits-boundaries-and-intervals CLASS INTERVALS http://www
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University of Phoenix Material BUGusa‚ Inc.‚ Worksheet Use the scenarios in the Bugusa‚ Inc.‚ link located on the student website to answer the following questions. Scenario: WIRETIME‚ Inc.‚ Advertisement Has WIRETIME‚ Inc.‚ committed any torts? If so‚ explain. WIRETIME‚ Inc. places an ad in a magazine stating that BUGusa devices were low quality and did not work for more than a month. The tort is defamation. Defamation occurs when one party makes a false statement about another. A
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Continental Carriers‚ Inc. Continental Carriers Inc.‚ established in 1952‚ is a regulated general commodities motor carrier whose routes ran the length of the Pacific Coast‚ from Oregon and California to the industrial Midwest‚ and from Chicago to several points in Texas. Continental Carriers struggled early‚ experiencing little growth‚ until the mid-1970¡¯s. Continental needed help in reducing operating costs and also sought improvement in terminal facilities. John Evans‚ president of CCI
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