Saturday, January 25, 2020

Essay --

Once considered taboo, tattoos have shed the social outcast stigma once associated with getting inked. One might even say tattoos have become trendy. The ancient art form traces back 4,000 years to the Egyptians. The oldest mummy ever found –dating back to the Bronze Age of Europe – had 59 tattoos. Tattoos have adorned the arms of kings, queens and czars, representing power and wealth. King Harold of England’s body was identified on a battleground by his tattoo, which featured the name Edith inscribed over his heart. King Edward VII of England had a dragon on his forearm. In Great Britain, tattoos were a sacred familial ritual as the Danes, Norse and Saxon tattooed their family crests on their chests. Tattooing spread in the United States as a way to memorialize fallen soldiers during the Civil War. Tattoos’ elite status symbol plummeted in 1891 when Samuel O’Reilly patented his tattoo machine in New York. Tattoos, which were previously available only to the upper class, became popular with the general public. By the early 1900s, tattoos became associated with the lower class,...

Friday, January 17, 2020

Practical Business Analysis Essay

1. Re-do all problems in Practice Problem Set 1. 2. Dollar Car Rental Co. was originally named Dollar a Day Car Rental because they charged $1.00 per day to rent a car, plus a charge per mile driven. Many customers complained that the odometers on Dollar’s cars recorded more miles than were actually driven. To evaluate these complaints you take a random sample of 6 Dollar’s cars, drive them on a carefully measured 100-mile course, and record the miles driven as registered by the odometers. The results are 100, 105, 109, 102, 107, and 101, with the sample standard deviation around 3.578. a. Using these sample results, construct a 95% confidence interval for the population mean miles recorded by all Dollar cars for a 100-mile trip. b. As a legal consultant hired by the group of the customers who complained about the odometers, do you have enough evidence to support your clients’ claim? State your hypotheses (H0 vs. Ha), rejection region and both statistical and sub stantive conclusions. 3. The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an â€Å"A† grade to the top 10% of the scores, a â€Å"B† grade to the next 10% of the scores, a â€Å"C† grade to the next 10% of the scores, a â€Å"D† grade to the next 10% of the scores, and an â€Å"F† grade to all scores below the 60th percentile of this distribution. For each possible letter grade, find the lowest acceptable score within the established range. 4. The weekly demand for General Motors car sales follows a normal distribution with a mean of 40,000 cars and a standard deviation of 12,000 cars. a. There is a 5% chance that GM will sell more than what number of cars during the next week? b. What is the probability that GM will sell between 20 and 23 thousand cars during the next week? 5. A department store is interested in the average balance that is carried on its store’s credit card. A sample of 40 accounts reveals an average balance of $1,250 and a standard deviation of $350. a. Find a 95% confidence interval for the mean account balance on this store’s credit card. b. What sample size would be needed to ensure that we could estimate the true mean account balance and have only 5 chances in 100 of being off by more than $100? 6. A marketing research consultant hired by Coca-Cola is interested in determining the proportion of customers who favor Coke over other soft drinks. A random sample of 400 consumers was selected from the market under investigation and showed that 53% favored Coca-Cola over other brands. a. Compute a 95% confidence interval for the true proportion of people who favor Coke. Do the results of this poll convince you that a majority of people favor Coke? b. Suppose 2,000 (not 400) people were polled and 53% favored Coke. Would you now be convinced that a majority of people favor Coke? 7. BatCo (The Battery Company) produces your typical consumer battery. The company claims that their batteries last at least 100 hours, on average. Your experience with the BatCo battery has been somewhat different, so you decide to conduct a test to see if the companies claim is true. You believe that the mean life is actually less than the 100 hours BatCo claims. You decide to collect data on the average battery life (in hours) of a random sample and the information related to the hypothesis test is presented below. Use this information to answer the following questions. a. You believe that the mean life is actually less than 100 hours, should you conduct a one-tailed or a two-tailed hypothesis test? State your alternative hypothesis. b. If you use a 5% significance level, would you conclude that the mean life of the batteries is typically more than 100 hours? State the rejection region and calculate the test statistic. c. If you were to use a 1% significance level in this case, would you conclude that the mean life of the batteries is typically more than 100 hours? Explain your answer. 8. Q-Mart is interested in comparing customer who used it own charge card with those who use other types of credit cards. Q-Mart would like to know if customers who use the Q-Mart card spend more money per visit, on average, than customers who use some other type of credit card. They have collected information on a random sample of 38 charge customers and the data is presented below. On average, the person using a Q-Mart card spends $192.81 per visit and customers using another type of card spend $104.47 per visit. Use the information below to answer the following questions. a. Given the information above, what is [pic] and [pic] for this comparison? Also, does this represent a one-tailed or a two-tailed test? Explain your answer. b. Using a 1% level of significance, is there sufficient evidence for Q-Mart to conclude that customers who use the Q-Mart card charge, on average, more than those who use another charge card? Explain your answer. 9. Suppose that you were asked to test H0: ÃŽ ¼ = 10 versus Ha: ÃŽ ¼ > 10 at the [pic] = 0.05 significance level and with a sample of size n = 10. Furthermore, suppose that you observed values of the sample mean and sample standard deviation and concluded that H0 be rejected. Is it true that you might fail to reject H0 if you were to observe the same values of the sample mean and standard deviation from a sample with n > 10? Why or why not? 10. Stock-market analysts are keenly interested in determining what factors influence the price of a stock. After some examination, a statistician hypothesized that a stock price (Y in $) would be affected by its quarterly dividends (X1 in $), its price/earnings ratio (X2), and the interest rate of treasury bills (X3 in %). The values of the relevant variables were observed for a period of 40 quarters. When the data were run on STATGRAPHICS PLUS, the accompanying printout was created.

Thursday, January 9, 2020

George Washington - The Man Who Would Not Be King - Free Essay Example

Sample details Pages: 2 Words: 520 Downloads: 7 Date added: 2019/07/08 Category People Essay Level High school Tags: George Washington Essay Did you like this example? There are many people who solely remember george washington as the one who began presidency in the united states or the man on moneys one-dollar. due to these minimal assumptions people do not care to research or even acknowledge his many different traits and personas. As a young man he was pretty insecure yet full of himself and feared that another man would conduct better qualities than his own. When he was in his earlier years he was given the privilege to acquire his own land but he did not receive his first assignment of battle until the age of twenty-two. Fort necessity marked the first major event in his military career but this battle carried a negative effect on the people and washington. he surrendered to his enemies at midnight and proved himself a burden to the people. For this battle introduced the french and indian war and many blamed him for this cause. But despite all the defeats and hardships that came with the insufferable seven years war george washingtons character and confidence was shaped and strengthened through his experiences and endless battles. Even later when the american revolution came to place washington continued to prove his brilliance and leadership that was planted during his previous duels of war. For instance on christmas day he and his men snuck on enemy ground and gained victory over the british soldiers who grew too drunk to prepare for such surprise. Washington proved himself to many people as the true american revolution. Even with all the constant need for battle and struggle for victory washington did live outside of official duties. He was factually quite the bookworm. He would spend his free time educating himself and focusing his mind inside literature. he also enjoyed theater and even had a personal favorite out of the plays he contentedly observed. although he carried good character and practiced calming hobbies as shown previously washington had a few faults of his own. specifically speaking he was a man who desired women. He even fell in deep admiration for sally fairfax though she was already marrie d and even showed his aspire towards sally by published letters to her. Washington also owned slaves whom he viewed as property and nothing more. Near his death however he found slavery to be useless and freed his slaves in his own will. With all his wit and pride washington struggled for conquest and triumph over his enemies but the presentation of his speech to the officials was his greatest performance. Though seeming shocking he actually won the hearts of the officials by wearing a significant pair of glasses. For the glasses symbolized his decline in strength and his own personal pain. Through his speech men viewed him as he dreamed they would: the man who was qualified for leadership and a man of integrity. Washington might have been an insecure man growing up but because of his perseverance leadership and recognition within himself he became the first and one of the most outstanding premiers from centuries before. May generations to com remember and acknowledge the true biography of george washington. Don’t waste time! Our writers will create an original "George Washington The Man Who Would Not Be King" essay for you Create order