4. An investigator performed cytofluorimetric (FACS) analyses of a mouse strain called C.B20 and a spontaneously arising point mutant that arose in the same strain called "C.B20 scid." Splenocytes from each strain were stained with anti-IgM (green) and anti-CD3 (red), then analyzed. The proportion of cells falling into each phenotypic category defined by these markers were then assessed.
The table below shows the results from all possible donor-recipient combinations of skin grafts between C.B20, C.B20 scid and another, genetically disparate strain called C57BL. Each kind of graft was done on ten mice.
? From the first table, what do you conclude about the scid mutation?
? From the second table, what do you conclude about the mechanism of graft rejection?
1) From the first table, what do you conclude about the scid mutation?
First off, based on the data, you need to know that IgM is from B cells and CD3 is from T cells. The data in table one says that normal mice have few immature immune cells (immature cells wouldn't have IgM or CD3, so they would be IgM-CD3-). They have many more B ...
You have been retained by a regional food marketer, FoodKing, to forecast the demand for small cakes that are mass-produced and marketed under the name Johnny's Pies. To assist with your analysis, you are provided with data that was collected for 8 consecutive quarters and 6 geographic markets.
(a) Estimate a regression model that expresses sales as a function of price, income and competitor's price and population? Once you have estimates the regression model, (a) provide a clear interpretation of the "R2" and (b) the statistical significant of the overall regression. Be sure to explain if the overall regression is statistically significant at a 5% level and how you know that.
b) Can you provide a clear, concise interpretation for the slope coefficient on price?
Is that coefficient significantly different from zero? How do you know that?
c) Can you provide a clear, concise interpretation for the slope coefficient on income?
d) FoodKing is considering entering a new market. In this market, the population is
2,650,000, the average (or per capita) income is $42,500 and the competitor's product sells for $4.85. Using this regression model, if you price your product at $5.25, how many pies will you sell?
If you price your product at $5.25, what would be the price elasticity of demand for your product at that price? Is this elastic or inelastic? If you raised the price of the product by a very small amount, would the profit rise or fall?
(f) At what price would you maximize the TOTAL REVENUE that the firm receives?
Assume that if your firm enters the market, is will be able to produce pies at a constant marginal cost of $3.25 per pie, at what price would it maximize PROFITS? Do you need to know the fixed cost to answer this question? What is the price elasticity of demand at that price?
) One of your assistants notes that market that you are considering entering is located in the southern part of the nation and asserts that "everyone knows that southerners eat lots of snack cakes." You note that in your data set, Atlanta and Dallas are the only two cities that are in the "South" census district. Can you test you assistant's hypothesis that "southerners eat lots of snack cakes" - is she correct?View Full Posting Details