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# the claim by a weight loss company is that on average the client will lose pounds over

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first 2 weeks. 50 people who joined the programme are sampled, their weight loss is 9 pounds with a standard deviation of 2.8 pounds. Can we conclude at the .05 level that a person joining the programme will lose less than 10 pounds? (2) The following is a random sample of 90-day futures prices in dollars for 1 troy oz. of silver from The Wall Street Journal issues in May and June of 1997: 4.74, 4.77, 4.87, 4.91, 4.83, 4.72, 4.92, 4.86, 4.97, 4.71, 4.90, 4.93, 4.75, 4.88, 4.79, 4.83, 4.89. Required: a. Calculate the mean b. Median c. Standard deviation of the 90-day future price of silver data (3) A mining company needs to estimate the average amount of copper ore per ton mined. A random sample of 50 tons gives a sample mean of 146,75 pounds. The population standard deviation is assumed to be 35.2 pounds. Required: a. Give a 95% confidence interval for the average amount of copper in the population of tons mined. b. Give a 90% confidence interval for the average amount of coper per ton c. Give a 99% confidence interval for the average amount of coper per ton (4) An e-commerce Website gets 2,385 visitors on a particular day. Among these, 1790 visitors explore the products by looking at more pages at the site. Among these 1790 visitors who explore the products, 387 make a purchase. Required: a. If a visitor chosen at random from all those who visited the site, what is the probability that the visitor explored the products b. If a visitor is chosen at random from all those who visited the site, what is the probability that the visitor made a purchase. c. If a visitor is chosen at random from all those who explored the products, what is the probability that the visitor made a purchase. d. Which of the preceding three probabilities is relevant to the design of the home page that leads to product page.
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. 294-297) Betty Powers, "Federal Writers' Project Interview" (c. 1936), Sheets, Sources, 15-2, pp. 363-365 (9th ed.: 14-2, pp. 297-299) Frances Butler Leigh, "Letter to a Friend in England" (1867), Sheets, Sources, 15-3, pp. 365-367 (9th ed.: 14-3, pp. 299-301) Charles Frances Adams, Junior, "The Protection of the Ballot in National Elections" (1869), Sheets, Sources, 15-4, pp. 368-373 (9th ed.: 14-4, pp. 302-305) Rev. Henry McNeal Turner, "Speech Before the Georgia State Legislature" (1868), Sheets, Sources, P5-6, pp. 419-421 (9th ed.: PDF herePreview the document) In the aftermath of the Civil War, the political, social, and economic status of freedmen became a hotly debated topic, particularly concerning the questions of citizenship and voting. "Am I a man? If I am such, I claim the rights of a man," Henry McNeal Turner thundered to the Georgia State Legislature in 1868 (Sheets, 419). The ratification of the Fourteenth and Fifteenth Amendments (1868, 1870) defined these issues from a Constitutional standpoint, but the actual experiences of African American people in the wake of freedom were far more complicated. Based on these readings, how did Americans interpret the implications of emancipation in different ways? How was freedom celebrated by some? How was it tied directly to citizenship and voting rights for some? And, for others, how was the freedom of blacks something to be restricted (and even feared)? A minimum of one well-developed paragraph is required. Please cite specific examples from the readings.
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