Amazon.com

Amazon’s model is not suited for their perpetual growth in coming years. Amazon must consider investing some of its substantial cash reserves to diversify its portfolio of businesses to help protect them against the ever-changing technological and consumer patterns by creating new avenues for revenue growth. Amazon posted a small but unexpected loss in the second quarter of 2013, as it continues to spend heavily on fulfillment centers and digital content. Amazon.com lost $7 million, 2 cents a share, after earning $7 million, 2 cents a share, a year earlier. Amazon can roll out an online payments option that lets shoppers make purchases on websites by logging in with their regular Amazon accounts. Their very own service such as PayPal. By doing this they will benefit their company the most because in the past customers had to separately enter their account details for each purchase made at one of Amazons third-party retailers. Now, Amazon could enable companies to make millions of Amazon customers their customers by inviting online shoppers with Amazon credentials to access their account information safely and securely with a single login. This alternative will also enable Amazon to have a better control on their customer base. The only drawback of this alternative is that Amazon will encounter competition from services such as PayPal.

The T Test and the Chi-square Test Article Example | Topics and Well Written Essays - 1250 words

The T Test and the Chi-square Test - Article Example That is the significant differences in the means of two independently sampled populations can be evaluated. The two assumptions are the independence of population and within each population, the variable of interest is normally distributed with equal variances. The mathematical derivation of this test statistic is as follows: where n1 and n2 are the numbers of observations in each of the two groups; x1 and x2 are the means of the two groups. is the estimate of the standard deviation of (á ºâ€¹1 - á ºâ€¹2) and is calculated using the formula: Consider the situation when we would like to determine whether there was a significant difference in the infant birth weight between mothers who smoked during pregnancy and those who did not. The mean birth weight measured among ten infants whose mothers smoked was 5 lbs., while the mean birth weight measured among the same number of infants whose mothers did not smoke was 8 lbs. Based on the weight measurements of the 20 infants, the pooled sample variance was obtained as 3 lbs. Using the above formula, the calculated t-test statistic was approximately 3.9 with 18 degrees of freedom. The two-sided p-value associated with this test is approximately 0.0006. In other words, even if there was no connection between birth weight and maternal smoking, it could be said that there is a 6 out of 10,000 chance of observing a difference at least as large as 3 lbs. by chance alone. Hence we would conclude that the observed mean difference of 3 lbs. was statistically significant as it could not b e explained as to be by chance. The chi-square test is used to compare the observed data with data expected to obtain according to a specific hypothesis. The data involves categorical variables only. It requires the observed data in a tabular format containing the categories in rows and columns. Thus chi-square test statistic is designed to test the null hypothesis that there is no association between the rows and columns.

State of Personal Computers Market in the UK Assignment

State of Personal Computers Market in the UK - Assignment Example In other words, the portable PC must not necessarily have big memory or storage space since it can retrieve data from the centric server within the company (Gillam, 2010). Several companies adopted this technology, hence increased sale of the portable PC but reduced sales of desktops. A good VDI network may comprise of at least one desktop with over 70 portable PC depending on the size of the company. Other clouding technology also followed and led to a further increase in sales of portable PCs. The graph below shows a non-uniform decrease in PCs’ prices as time (in years) advances. Increase in PCs producing firms There have been increases in the number of mobile PC companies venturing into the market. These include Samsung which manufactured laptops, net books, notebooks, tablets and mini laptops among other portable PCs. Apple manufactures iMacs and iPhones among other portable PCs. These products had advanced and efficient applications and specifications that later attracte d more customers. Majority shipped their desktops to developing nations while some were treated as electronic wastes. The younger generations were compelled to purchase the portable the portable gadgets since they have social media applications like twitter, Facebook and Skype among other applications. The products also came in smaller sizes but attractive shapes and colors to attract more customers (Bradley, 2005). The aspect of compatibility also enhanced increased demand for the products. One can easily connect his/her portable computer with the sound system or flat screen televisions for entertainment purpose. The companies have stiff competition with regular advancement of the portable computers which has kept the demand on a steady growing trend, since majority dump or ship their... This paper offers a comprehensive theoretic economic analysis of high price elasticity of the demand for personal computers in the UK market. In the 2007, the market of personal computers in the UK recorded an estimated net worth of 12.27 billion USD. This increased to 12.81 billion USD in the year 2008 (4.4 % increase). The market PC market continued to depreciate to about 11.77 billion USD by the end of the year 2009. However, the same report indicates the market worth was on a growing trend from 2005 until 2008, from which the PC market worth started depreciating.There are several factors that boosted the increase in the PC market worth between 2005 and 2008. Several companies register an increase in sales of portable or mobile personal computers. The introduction of the portable PC in the markets attracted more customers The law of demand and supply states the demand will increase as the price decreases and other factors held constant. However, this economic principle does not apply in the personal computer business. Since 2005, the price for the personal computers has been on a falling trend despite continuous growth in demand. Different markets have different demand, price and supply relations depending on the prevailing economic status as well as the countries demographic characteristics among some factors. Different nations also have different policies or legislations to control its business. The aspect of a global description of the elastic curve with respect to the personal computers is a challenge.