Reference no: EM13245428
1. A sporting goods producer claims that the variance of the strengths of a certain fishing line is 15.9. A random sample of 15 spools has a variance of 21.8. At "alpha" = 0.01, can the claim be proven wrong? Assume the population is normally distributed.
2. The standard deviation of the amount of fat in whole milk is claimed to be no greater than 0.50 by the Dairy Association. You do not believe this. You find that a random sample of 31 milk containers has a standard deviation of 0.53. Using "alpha" = 0.05, is there enough evidence to reject the Association's claim? Would your conclusion change if "alpha" = 0.01? Assume the population is normally distributed.
3. A national faculty group conducts salary surveys each year. For 2008, 35 University Professor's had an average salary of $88,200 and 30 Community College Instructor's had an average salary of $73,200. The population standard deviations are known to be $25,800 and $25,600, respectively. At "alpha" = 0.01, can we conclude that university salaries are higher than at the CC's?
4. A USA Today Snapshot states that the government claims that there is a significant difference in the mean credit card debts of households in New York and Texas. A sample of 250 households from each state gave these results: NY mean = $4446.25 with deviation = $845.70 while for TX the mean = $4567.24 with deviation = $561.95. At "alpha" = 0.10, is there a significant difference in debt? Part two: would your conclusion change if "alpha" were .05?
|
Fullerton wine company is a retailer which sells
: Fullerton Wine Company is a retailer which sells vintage wines. The company has established a policy of reordering inventory every 30 days.
|
|
Approximately how fast are the waves moving
: From the shore, you observe a buoy in the ocean rising and falling with the waves. You determine it takes 5 s for the buoy to go down and up again, Approximately how fast are the waves moving
|
|
Explain the physical origins of linewidths in absorption
: Describe the physical origins of linewidths in absorption and emission spectra. Do you expect the same contributions for species in condensed and gas phases
|
|
Determine what total interest paid in year 3
: Ross Machine Company in Smithville, Tennessee is considering buying a "CNC Machining Center" for its machining department. The cost of the machine is $60,000. A down payment of $20,000 is required by the machine tool builder
|
|
Can the claim be proven wrong
: A sporting goods producer claims that the variance of the strengths of a certain fishing line is 15.9. A random sample of 15 spools has a variance of 21.8. At "alpha" = 0.01, can the claim be proven wrong
|
|
Do you find the most important aspect of our economy that
: Do you find the most important aspect of our economy that needs to be fixed is the budget deficit?
|
|
Calculate the max speed obtained by the object
: An object with mass 4.0kg is executing simple harmonic motion, attached to a spring with spring constant 300N/m, Calculate the max speed obtained by the object
|
|
Explain the neutrons from one treatment source
: The neutrons from one treatment source have an average velocity of 3.4 x 10^7 m/s. If the velocities of the individual neutrons are known to within 2% of this value, what is the uncertainty in this position of one of them
|
|
Judy should finance the expansion with the bank loan
: The cost of expanding trade credit using the approximation formula is less than the cost of the bank loan. However, the true cost of the trade credit when compounding is considered is greater than the cost of the bank loan.
|