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Question: Buy-side versus sell-side analysts' earnings forecasts. The Financial Analysts Journal (July/August 2008) published a study comparing the earnings forecasts of buy-side and sell-side analysts. A team of Harvard Business School professors used regression to model the relative optimism (y) of the analysts' 3-month horizon forecasts based on the following independent variables. Determine the type (quantitative or qualitative) of each variable.
(a) Whether the analyst worked for a buy-side firm or a sell-side firm.
(b) Number of days between forecast and fiscal year-end (i.e., forecast horizon).
(c) Number of quarters the analyst had worked with the firm.
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
When sampling is from a normal population with an unknown variance, is the sampling distribution of the sample mean normal? Explain.
Use the above results and write the regression equation that can be used to predict sales. Estimate the sales volume for an advertising expenditure of 3.5 million dollars and 45 salespeople. Give your answer in dollars
Repairs. The probability model below describes the number of repair calls that an appliance repair shop may receive during an hour.
A market survey was conducted to estimate the proportion of homemakers who would recognize the brand name of a cleanser based on the shape and color of the container. Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name.
New soft drink is being market tested. A sample of 400 individuals participated in the taste test and 100 indicated that they like the taste. Set up the null and the alternative hypotheses.
Assume that 13% of people are left-handed. If we select 5 people at random, find the probability of each outcome described.
1. Using the hardness data from the odor data set odor .txt, do the following. (a) Make a normal probability plot of the data. (b) Do the data appear to be normally distributed? Explain.
Use the data to determine whether there is a difference in prices at these four grocery store chains. Use α = 0.01. State any assumptions you have made to solve this problem.
a company decides to add a new program that prepares randomly selected sales personnel to increase their number of
Suppose we have 3 distinct people, 4 identical math books, and 5 identical history books. How many different (distinguishable) ways
If the probability that a scanning error occurs is 0.0065, use either Excel or Minitab to find the probability that exactly 20 items will be scanned incorrectly
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