The T-TEST 1.0 INTRODUCTION The t-test was developed by W. S. Gossett‚ a statistician employed at the Guinness brewery. However‚ because the brewery did not allow employees to publish their research‚ Gossett’s work on the t-test appears under the name "Student". The t-test is sometimes referred to as "Student’s t-test." Gossett was a chemist and was responsible for developing procedures for ensuring the similarity of batches of Guinness. The t-test was developed as a way of measuring how closely
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Topic 2 – Cell membranes Reading Chapter 5 Objectives Functions of cell membranes The fluid mosaic model The lipid bilayer – phospholipids‚ glycolipids and sterols Properties of the lipid bilayer Membrane proteins – the ‘mosaic’ in the model Solute movements across membranes BIO 1140 – SLIDE 1 http://www.nikonsmallworld.com/gallery/year/2006/id/751 Functions of cell membranes – an overview Fluid mosaic model Singer & Nicolson 1972 Fluid lipid molecules in which
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energy. The design won a silver award at the Lite-On awards last year What is the T-box? The T- box is a power generated device that harnesses wind energy as trains run over railroad tracks. This alternative form of wind energy produced by trains is very unique‚ as it does not depend on any natural energy sources. Instead‚ the energy generated from this device is produced as a consequence of human activity. The T- box device generates energy without any interference of the normal train operation
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Bacterial cells are Prokaryotic cells. These cells have several internal structures and surface structures. The cell walls are of two types‚ gram positive and gram negative. Out of all the structures‚ the two selected structures are the cell- wall and endospores. The cell- wall of bacterial cells is found in three distinct shapes such as spherical‚ spiral and rod shaped. The cell wall of the bacterial cells is composed of the proteins and polysaccharides. This is collectively called peptidoglycan
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characteristics of a healthy cell and a cancer cell is very different. Healthy cells stop reproducing when there are enough cells‚ however‚ cancer cells continue to reproduce. Due to this continued growth a tumor‚ which is a cluster of cancer cells‚ is formed. Cancer cells do not interact with other cells like the healthy cells. Healthy cells stop growing when they hear signals from the nearby cells‚ in contrast‚ cancer cells do not respond to these signals. When healthy cells get old or damaged they
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Case Studies The Model T Ford Henry Ford did not invent the motor car – in fact he was a comparative latecomer to the scene. Although he had started producing cars back in 1903 he had little success until the Model T. The first production Model T was built on September 27th‚ 1908 in Detroit and production continued until 1927. The key contribution which he made was to change the approach to manufacture and marketing of cars. Prior to his activities cars had been a specialised luxury product available
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a) Using a human cell of your choice‚ describe how organelles work together to make and secrete a protein (LO1. AC 1.1) An epithelial cell in the thyroid gland‚ called a thyrocyte forms spherical follicles that produce a protein called thyroglobulin. This is a globular protein that has a functional role in metabolism. The protein is used by the thyroid gland to produce thyroid hormones; thyroxine (T4) is an example of one of the hormones created. Thyroxine is formed by iodine binding to tyrosine
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roles of mitotic cell division‚ meiosis‚ and fertilization in the human life cycle. Mitosis allows for growth and repair from the fertilized egg to the adult. In reproductively mature individuals‚ meiosis creates gametes with half the genetic material. The male gamete then fertilizes the female gamete during sexual reproduction‚ forming a zygote with a full set of genetic material. 2. Why are both cell division and apoptosis necessary for the development of an organism? Cell division is needed
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Cited: Wilson‚ Tracy V. "Was Tyrannosaurus Rex a Predator or a Scavenger?" HowStuffWorks. N.p.‚ n.d. Web. 28 Nov. 2012. <http://science.howstuffworks.com/environmental/earth/geology/t-rex-predator-or-scavenger2.htm>.
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Q1. Culture gives meaning to objects and activities‚ such as food and cooking. How does TT Supermarket give a different meaning to food and cooking‚ as compared with a more conventional Loblaws Superstore Compared to a more conventional Loblaws Superstore‚ TT Supermarket provides customers with unique‚ even entertaining shopping experience. For example‚ in TT supermarket‚ there is a wide variety of seafood including different kinds of live fish in the tank. Consumers can pick up what they want easily
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