Statistics Essay Example | Topics and Well Written Essays - 1000 words - 1

Statistics - Essay Example if electronics’ price was measured in pounds). Since we have the same units for all the goods, we should use the ratio of aggregate prices. (c) Since we have fixed number of observations (random sample size is 16) the sample distribution is binomial. The Central Limit Theorem allows us to use approximate binomial distribution with the normal distribution when operating with large values of N. We can approximate binomial distribution with the normal distribution assuming that the whole number of steel coils is much larger than 16 (then the finite population correction will be close to one). (b)Confidence intervals give us the information that we can say with 90% of accuracy that the change between proportion is between 0.003 and 0.059. From this we can conclude that the proportion has slightly increased. (c) Sampling error can impact on the results of this study. There may be serious differences from sample to sample because the sampling technique used was simple random sampling. Additionally, non-response error can also influence the results of the study, since not all the drivers within the sample will admit using the cell phone. If we are to assume that all the drivers answer honestly then this error will not influence the results. (ii) If the null hypothesis is not true, then we can state that the productivity of exercisers is higher on average than that of non-exercisers. However reasons of this difference are not clear and require additional research. (b) Cluster sampling is about clusters, into which the whole population is divided. After that all units within the selected clusters are measured. Like cluster sampling stratified sampling also implies the division of the population into subgroups. However in stratified sampling they do not overlap and simple random sampling is implemented within each strata (subgroups). Due to dividing into subgroups every important strata is presented in the final sample. Additionally cluster

Ecommerce Essay Example | Topics and Well Written Essays - 1750 words

Ecommerce - Essay Example The other type is B2C, which involves the business selling directly to the consumer. This type of e-commerce is majorly associated with high demand consumer goods in the retail, wholesale and supermarket business models. An example is Azizia Panda business accessed through http://www.panda.com.sa/dammam/Aboutpanda?___store=dammam_en&___from_store=dammam_ar. B2C Online direct marketing that sells products online which derives revenue from Sales. http://www.expatriates.com/classifieds/saudi/. B2C also earns revenue through consultancy and offering advice to the customers. Through marketing other entities on their sites, B2C enterprises also earn revenue. C2C is another form of e-commerce, which mainly involves the consumers selling to fellow consumers. Online sales websites are common for this type of business which is mainly associated with the retail business. An example is the Jarir bookstore in Saudi Arabia accessed through www.jarirbookstore.com. C2C Online direct marketing that s erves as classified ads which derives revenue from Advertisement. Features that you like: The site is simple to access and guide the online shopper in terms of the characteristics of commodities that he or she is buying. The site is also accessible on mobile applications, making it an efficient application. The application can be compared to Jumia online shopping which operates globally on localized platforms. It is accessible through http://www.jumia.com. The application is compatible on mobile devices while it possesses features of high speed and efficiency in use. The feature also enables advance booking that could make business in KSA more dynamic. The site is lean in terms of drive space consumed making it faster and portable. Bigboxx.com operates a B2C type of e-commerce. This is mainly characterized by listings inviting the customers to shop online for their household goods. The business operates on a retail business model. They are selling single items to the