Cumulative gains charts for training sample and test sample - Comparison between the cumulative gains charts helps assessing the strength of the model. Key Observations – * The shapes of the curves are similar. * For both samples, the maximum distance between the model and no model lines is in the range of 36-37% for around 32-35% of customers. It can be inferred that predicted model using the sample data helps explaining the differences in the test sample as well. Hence, the nodes are pruned at the right points, minimizing the errors.
2.12 b. 1.734 c. -1.740 d. 1.740 ANSWER: d -same process but now go to one tailed α=0.05 and dof = 17 4. Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (lower tail), a sample size of 10 at a .10 level of significance; t = a. 1.383 b.
We made this inference due to our slope of each of the graphs. Given the mole ratios, the slope of our newer lab, comparing H2 to moles of Mg, should’ve been a slope of 1. But our first point skewed our results giving us an actual slop of 0.7, which was short from a more accurate result. And given our results last week, we concluded that our titration method was more accurate than our crystallization method due to the basically perfect slope of 2.0018 which is very close to the theoretical slope of 2. 5.
Practice Problems Psy 315 Chapter 2: 11. The mean is 2, the median is 2, the sum of squared deviations is -52, the variance is -2.47, and the standard deviation is 1.57. 12. The mean is 1.361, the median is 1.3124, the sum of squared deviations is 0.07608920.0190223, the variance is 0.0190223, and the standard deviation is 0.1379213544. 13.
There are two major ways to estimate inter-rater reliability. If your measurement consists of categories the raters would check off which category each human observation fall in, this helps you to calculate the percent of agreement between the raters. The other major way is to estimate when the measure is a continuous one. All you need to do this is calculate the correlation between the ratings of the two observers. The next type of reliability is test reliability.
A study of a component in Splenda (sucralose) concluded, “There is no indication that adverse effects on human health would occur from frequent or long-term exposure to sucralose at the maximum anticipated levels of intake”. However, a Duke University study conducted on rats (funded by The Sugar Association) shows that at sucralose consumption throughout a 12-week administration of Splenda exerted numerous adverse effects, which are known to limit the absorption of nutrients and oral medications. These effects have not been the subject of some controversy, with experts disagreeing over its conclusions. 4. Examine the relationship between the sweetener that you have selected and obesity.
In short the majority of AJ Davis customers are Urban dwellers. In addition a Pie-Chart below depicts the same data. 2) Income Based on the histogram above which used a sample of 50 customers from AJ Davis store the mean income is about $45.650 and it follow a normal curve or has what we call the bell curve. Descriptive Statistics: household size Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 household size 51 0 4.431 0.357 2.548 1.000 2.000 4.000 7.000 Variable Maximum household size 8.000 From a sample of 50 customers the average household is 4.4 and also the median household is 4. The maximum household is 8 and the minimum is 1.
When compared to medial column arthrodesis, the Cotton osteotomy has shown to be superior in multiple facets. In all 5 papers reviewed, all studies reported no nonunions using the Cotton. Only Boffeli et al. reported a single case of delayed union that was treated with a bone stimulator, which resolved at 6 months. Nonunion rates in midfoot arthrodesis procedures has been reported to be as high as 20%, strongly supporting the use of the Cotton.2 All papers reviewed supported the effectiveness of the Cotton as an adjunctive procedure in flatfoot surgery.
Federalism Assignment: (Maryland, Nebraska, and Texas.) Maryland: State Population: 5,884,563 over USA 313, 914, 040 Population listed as white only: 53.9% over USA 63.0% The median household income: $72,419 over USA $52,762 The percent of persons below the poverty level: 9.0% over USA 14.3% The number of persons per square mile: 594.8 over USA 87.4 Based on the data from the Census website, the population of Maryland is smaller than the population of the USA as a whole, there is a difference of 308, 029, 477 between the two population. The population listed as white only compared to the USA as whole is larger because the USA as a whole is 63.0% while Maryland is 53.9%. The median household income of Maryland is 19,657 higher than
1941 – 1969 1945 - 5 million more women working than in 1940 – many were married. 350,000 women joined the armed forces. After the war 75% of women wanted to stay in paid