Week 5 discussion and participation questions Essay

Week 5 discussion and participation questions - Essay Example An independent variable for this problem could be income. Hypothesis testing is a procedure that tests the validity of a statement in regards to a population parameter. A hypothesis is a statement about a population parameter. The five-step procedure for testing a hypothesis is: One of the reasons why hypothesis testing has been used in the business world for decades is due to its utility. The procedure can be used in a wide variety of scenarios or problem in order to test a potential hypothesis. One of the limitations of hypothesis testing is that there is a margin for error in the analysis. The ANOVA test compares the sample means through their variances. The test is applied by calculating two estimates of the variance population distributions: the variance between samples and the variance within samples. The application of regression analysis which uses both dependent and independent variables can be used in the business world to calculate a lot of different business problems and scenarios. For example a company can forecast the sales of the business for future periods utilizing the past historical sales data. A marketer could create an equation that uses dependent and independent variables to determine the preference in customer taste. In your example you mentioned the probabilities associated with card games. I am pretty sure that good Poker players are have an excellent understanding of probabilities and statistics. When I go to the casino I like playing blackjack. I know that when the dealer deals a lot of low cards and my turn is up the chances of the dealer giving me a high card increases. An equation that can be used to put the concept of dependent and independent variables into good use is the y = ax + b. In this equation x is the independent variable and y is the dependent variable. This equation can be used in the business world to solve a lot of different problems or scenarios. For example a research

Ecosystem structure and function lecture (Kindly follow the Essay

Ecosystem structure and function lecture (Kindly follow the instructions) not an - Essay Example The energy as a result of cellular respiration is called net primary productivity. Decomposers feed on the waste product. As one moves up the next energy level, only 10% of the energy moves to the next level with the rest been lost as heat (Boag, 1- 7). The net primary productivity of ecosystems such as marine ecosystems is limited by certain nutrients like nitrogen and phosphorus. Pyramids of biomass and energy change between ecosystems. Some pyramids of biomass are inverted. Biomagnification is as a result of the concentration of pollutants as they move from lower to higher trophic levels. The nutrients in an ecosystem are transferred from organism to organism through assimilation, consumption and decomposition. Factors that influence the rate of nutrient cycling in an ecosystem include decomposition of detritus limits the rate of movement of the nutrients through an ecosystem and the abundance of decomposers in terms of biomass. The carbon cycle involves the movement of carbon among terrestrial ecosystems, oceans and atmosphere. Photosynthesis and respiration are the main movers of carbon. Carbon dioxide is a greenhouse gas that traps heat on earth (Boag, 8 – 14). The lecture was full of intensity and concentration was required throughout without which vital concepts were missed. The reason why I chose to attend this lecture was because the topic on ecology is related to my field of study which is Microbiology and I have an interest in knowing the nature of the courses I shall attend during my graduate program. This lecture is related to my field of study through the study of the nature of organisms, how they coexist and relate to their environment. In this lecture, I already knew about the four components of the ecosystem. I learnt a new concept termed as biomagnifications. I learnt that my ability to follow take notes in a typical academic lecture was excellent at the beginning, but as the lecture went on, the