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1."Graphs That Enlighten and Graphs That Deceive" which, of course, need not be just statistical in nature. Find a graph of one of the types shown in the chapter (e.g. bar graph) in current news at an online news Web site (e.g. newspaper, TV or radio stations and networks), give the URL of the article, and critique the graph.
2. Why is the median price used to reflect average home prices in most areas, rather than the mean or mode? Should all people have similar houses or is it fair that some houses are much more expensive than others? Why or why not? 3. Construct 3 questions that could be answered using the Binomial Distribution and explain why you know the Binomial Distribution is appropriate to use in each case. 4. 2. Why is there more than one process for the Normal Distribution? Why are extra steps needed if the mean is not zero and the standard deviation is not one? 5. Explain what a confidence interval is and how it helps you to better understand the parameter of the population you are interested in?
Conduct a hypothesis test to verify if the claim that a bottle contains less than sixteen (16) ounces is supported. Clearly state the logic of your test, the calculations, and the conclusion of your test.
we estimate the mean price of a cell phone in the bay area using a 95 level of confidence. from a random sample of 25
Find the probability that the number who consider themselves baseball is (a) exactly 8, (b) at least 8, &(c)less than 8.
Find the power of the test to determine if the the new cream is effective, when the mean percent weight reduction is actually 2.4%. Assume that the population standard deviation is 7% and that the significance level is α=0.03.
Find the probability that Marys total worth reaches $3000 at some point. (We assume here that Mary has to quit playing if she goes bankrupt so this is a gamblers ruin problem.)
Which of the following can be treated as binomial experiment? (a) Surveying 1200 registered voters to determine their preferences for the next president?
an equiprobable approach goodness of fit test with 9 cells for sample data that is normally distributed with a mean of
Test whether the average cycle of sleeping and waking differs significantly from 24 hours.
What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA? He also wants to know about the relationship between pretest scores and final exam scores.
What is the optimal solution if the annual return for U.S. Oil changes from $3 to $8 per share (everything else stays the same)? What is the value of the total return?
Between 180 and 230 (inclusive) of the drivers in the sample regularly wear a seatbelt? Hint: Use the BINOMDIST function in Excel.
You are trying to determine whether male and female Central Bank employees, having equal qualifications, receive different salaries. The data contain the salaries (in thousands of dollars) for 9 male and 9 female employees. Assume salaries are nor..
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