An experiment was performed to compare the abrasive wear of two different laminated materials. 40 pieces of material 1 were tested by exposing each piece to a machine measuring wear. 100 pieces of material 2 were similarly tested. In each case, the depth of wear was observed. The samples of material 1 gave an average (coded) wear of 85 units with a sample standard deviation of 4, while the samples of material 2 gave an average of 81 with a sample standard deviation of 5. Can we conclude at the 0.05 level of significance that the abrasive wear of material 1 exceeds that of material 2 by more than 2 units? Assume the populations to be approximately normal?

1. The Wilcox Company sells two products, A and B, with contribution margin ratios of 40 and 30 percent and selling prices of $5 and $2.50 a unit. Fixed costs amount to $72,000 a month. Monthly sales average 30,000 units of product A and 40,000 units of product B.

Required:

a.

Assuming that three units of product A are sold for every four units of product B, calculate the dollar sales volume necessary to break even.

b.

As part of its cost accounting routine, Wilcox Company assigns $36,000 in fixed costs to each product each month. Calculate the break-even dollar sales volume for each product.

c.

Wilcox Company is considering spending an additional $9,700 a month on advertising, giving more emphasis to product A and less emphasis to product B. If its analysis is correct, sales of product A will increase to 40,000 units a month, but sales of product B will fall to 32,000 units a month. Recalculate the break-even sales volume, in dollars, at this new product mix. Should the proposal to spend the additional $9,700 a month be accepted?

You own a large share portfolio. Currently 40% of this portfolio is invested in two small IT companies where you own, in each case, about 20% of each company. The rest (60%) of your share portfolio is invested in 6 large mining companies quoted on both the London and Frankfurt stock exchanges. Your share holdings in these 6 companies are a tiny proportion their market capitalization.

Explain the risks arising from your portfolio composition and comment on how you might want to change the composition of your portfolio

1. A jorurnal including journal entries for the first two months of operations. At least 40 is required.

2. General ledger. Include any necessary subsidiary leger for jobs, customers and suppliers

Hi, so this is my part for a group project. Im stuck on the journal entries,were doing a notebook company

so far i have the basic journal enries like rent expense ink and paper inventory. Thanks

if anybody can just give me a some examples of transaction entries or journal entries in general that would be great.

The steel pipe (100 mm outer diameter) is covered with two layers of insulation. The 40 mm thick inner layer has a thermal conductivity of 0.07 W / (mK). Outer layer, 20 mm thick has a thermal conductivity of 0.15 W / (m K). The pipe is used to drain 500 kPa pressurized steam. The temperature on the outer insulation surface is 24 ° C. If the pipe is 8 m long, determine the following: (assuming that the conduction heat transfer resistance of steel pipes and vapor convection resistance is ignored).
a. Heat loss per hour. = kJ / hour.
b. Temperature between insulation layers. = ° C.

1. The local police department is considering two types of sidearms for its officers. The Glock 40 costs $400 apiece and has a life of 4 years. The other option is a Sauer 45 that costs $800 and has a 12-year life. The Sauer pistol has a residual value of $200 at the end of its 12-year service life. Determine the better choice using the PW method and a study period of 8 years. The department uses a MARR of 5%.
2. Three different methods can be used for recovering by-product heavy metals from a manufacturing site’s liquid waste. The investment costs and incomes associated with each method are shown below. Assuming all methods have a 10-year life and the company’s MARR is 10% per year, determine which method should be selected using Annual Worth Analysis.

3. 	Method 1	Method 2	Method 3
   First Cost, $	20,000	18,000	25,000
   Salvage Value, $	1,000	3,000	1,500
   Annual Income, $	5,000	5,000	7,000

Among 40 individuals, 4 are heterozygous for a particular locus with two alleles (A1 and A2), 16 are homozygous for allele A1, and 20 are homozygous for allele A2.

1. What is the frequency of allele A1?

2.What is chi-squared for your observed/expected genotypes?

3.Does the population depart significantly from Hardy-Weinberg expectations? (For 1 degree of freedom χ,> 3.84 is significant)

Karim deposits $100 every two years for 40 years into an account that earns an effective annual interest rate i. The accumulated value after 20 years is X. The accumulated value after 40 years is Y.

a) i = 2%. Find X. Find Y.

b) i is unknown, but Y = 4X. Find i. Find X.

A school psychologist wishes to determine whether a new antismoking film actually reduces the daily consumption of cigarettes by teenage smokers. The mean daily cigarette consumption is calculated for each eight teenage smokers during the month before and the month after the film presentation, with the following results:

MEAN DAILY CIGARETTE CONSUMPTION

(Note: when deciding on the form of the alternative hypothesis, H1, remember that a positive difference score (D=X1-X2) reflects a decline in cigarette consumption.)

Using t, test the null hypothesis at the .05 level of significance.

A)What is the research problem in this scenario?

B)Which of the following is the appropriate pair of statistical hypotheses for this study?

C)Compute the degrees of freedom for this scenario.

D)What is the decision rule in this scenario?

E)Calculate the value of the t test.

F)What is the decision about the null hypothesis in this scenario?

H)What is the interpretation in this scenario?

I)If appropriate (because the null hypothesis was rejected), construct a 95 percent confidence interval for the true population mean for all difference scores and use Cohen’s d to obtain a standardized of the effect size. Lower bound, upper bound, or 0 if null hypothesis is retained

J)Enter the estimate of the standardized effect size (Cohen’s d).

K)What might be done to improve the design of this experiment?

A string of 0s and 1s is to be processed and converted to an even-parity string by adding a parity bit to the
end of the string.(For an explanation of the use of parity bits, see Example 30 in Chapter 9.) The parity
bit is initially 0. When a 0 character is processed, the parity bit remains unchanged. When a 1 character
is processed, the parity bit is switched from 0 to 1 or from 1 to 0. Prove that the number of 1s in the final
string, that is, including the parity bit, is always even. (Hint: Consider various cases.)