In addition to the Dow Jones Industrial Average, there are other indicators of fluctuation in stock prices. Two examples are the New York Stock Exchange Composite Index and the Standard and Poor’s 500. Choose a stock index (other than the Dow Jones), and write a report about it. Include whether it is adjusted for inflation, seasonally adjusted, or both. Give information about its recent performance, and compare it with performance a few decades ago. Make a conclusion about whether the stock market has gone up or down in that time period, based on the index you are using, adjusted for inflation.
Answer to relevant QuestionsSuppose you want to estimate the proportion of students at your college who are left-handed. You decide to collect a random sample of 200 students and ask them which hand is dominant. Go through the conditions for which the ...Explain whether each of the following situations meets the conditions for which the Rule for Sample Proportions applies. If not, explain which condition is violated. a. You are interested in knowing what proportion of days ...A Gallup Poll found that of 800 randomly selected drivers surveyed, 70% thought they were better-than-average drivers. In truth, in the population, no more than 50% of all drivers can be “better than average,” assuming ...Carry out the simulation in Mini-Project # 1 using a computer or website instead of physically doing so. Go through the same steps and answer the same questions. Refer to the formula for a confidence interval in the Focus on Formulas section. a. Write the formula for a 90% confidence interval for a proportion. b. Refer to Example 20.6. Construct a 90% confidence interval for the ...
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