An educational psychologist was curious whether students who consistently sit in
the front row of lectures achieved higher grades than students who consistently sit in the
back row. He published an online survey available to university students in which
participants self-reported which row they sat in during lectures throughout the semester
and the their final grade point average at the end of the semester. He was interested in
comparing the grade point averages of two groups of students: those who sat in front of the
class and those who sat in the back. What analysis should he perform?
fe, Alfred was surrounded by science. His father taught him basic principles of engineering and explosives, this went on to be his main interests later in life. Alfred grew up in Stockholm, Sweden, born: 21st October 1833. However, his family moved to Saint Petersburg in 1842 due to his father’s various business failures. Once in the city his father became successful as a manufacturer of tools and explosives. Now wealthy, Alfred’s parents were able to send him to private tutors and he excelled in his studies, specifically chemistry and languages. Fun fact: Alfred Nobel was fluent in English, French, German, Russian and of course Swedish. In 1850, Alfred moved to Paris to continue his studies. He met Ascanio Sobrero, who invented nitroglycerin 3 years earlier. Alfred was intrigued by the instability of Nitroglycerin and went to America to research further. After the Crimean War (1853-1856) Alfred’s father had difficulty switching back to domestic production, so he declared the company bankrupt. In 1859, Immanuel ( his father ) handed the company down to his second son, Ludvig Nobel who went on to greatly improve the business. Nobel devoted himself to the obdurate study of explosives, especially the safe manufacture and use of nitroglycerin. On the 3rd of September 1864, part of a nitroglycerin factory exploded in Heleneborg, Stockholm, killing 5 people including Alfred’s younger brother Emil. However, Alfred continued building factories and developing new technology, unfazed by this. Finally in 1866 Nobel invented dynamite. A more stable compound of Nitroglycerin and Diatomaceous earth, which is a soft rock mostly made of fossilised algae. He moulded it into cylinder shaped sticks and used blasting caps (which he invented a few years earlier) to allow for the safe ignition of such a powerful explosive. He lived the rest of his life being showered in awards from multiple universities and had an award named after him, The Nobel Prize. He was very rich and his money ended up being used to fund these yearly prizes that bear his name. Alfred was a lonely person, he never made a family of his own or got married. He had an interest in literature and often wrote poetry, novels and plays. He once wrote, “Numerous friends are to be found only among dog>GET ANSWER