Requirements:
In: Accounting
Let Y1, Y2, . . . , Y20 be a random sample of size n = 20 from a normal distribution with unknown mean µ and known variance σ 2 = 5. We want to test H0; µ = 7 vs. Ha : µ > 7. (a) Find the uniformly most powerful test with significance level 0.05. (b) For the test in (a), find the power at each of the following alternative values of µ: µa = 7.5, 8.0, 8.5, and 9.0. (c) Sketch a graph of the power function (d) What is the smallest sample size n such that an α = 0.05-level test has power at least 0.8 when µ = 8?
In: Statistics and Probability
CoR Stock
|
Scenario |
Probability of Scenario |
Rate of Return |
|
Worst Case |
0.10 |
−11% |
|
Poor Case |
0.20 |
−4% |
|
Most Likely |
0.40 |
−2% |
|
Good Case |
0.20 |
8% |
|
Best Case |
0.10 |
14% |
In: Finance
Consider the two (excess return) index-model regression results for stocks A and B. The risk-free rate over the period was 8%, and the market’s average return was 14%. Performance is measured using an index model regression on excess returns.
| Stock A | Stock B | ||||||||||
| Index model regression estimates | 1% + 1.2(rM − rf) | 2% + 0.8(rM − rf) | |||||||||
| R-square | 0.665 | 0.481 | |||||||||
| Residual standard deviation, σ(e) | 11.8% | 20.6% | |||||||||
| Standard deviation of excess returns | 23.1% | 27.9% | |||||||||
a. Calculate the following statistics for each stock: (Round your answers to 4 decimal places.)
Treynor measure:
In: Finance
Performace bike co is a wholesaler of motorcycle supplies.An aging of the company's account receivable on December 31 and a historical analysis of the percentage of uncollectible accounts in each age category are as follows
| Age Interval | Balance | Percent Uncollectible |
| Not past due | $3,250,000 | 0.8% |
| 1-30 days past due | 10,50,000 | 2.4% |
| 31-60 days past due | 7,80,000 | 7.0 |
| 61-90 days past due | 3,20,000 | 18.0 |
| 91-180 days past due | 2,40,000 | 34.0 |
| over 180 days past due | 1,50,000 | 85.0 |
Estimate the proper balance of the allowance for doubtful accounts as of December 31
In: Accounting
Engineers must consider the breadths of male heads when
designing helmets. The company researchers have determined that the
population of potential clientele have head breadths that are
normally distributed with a mean of 6.7-in and a standard deviation
of 0.8-in.
In what range would you expect to find the middle 98% of most head
breadths?
Between ___ and ___ .
If you were to draw samples of size 34 from this population, in
what range would you expect to find the middle 98% of most averages
for the breadths of male heads in the sample?
Between ___ and ___ .
Enter your answers as numbers. Your answers should be accurate to 2
decimal places.
In: Statistics and Probability
Calculate the heat-removal factor for a collector having an overall heat loss coefficient of 10 W/m2 K and constructed of copper fins and tubes (k = 390 W/m?K). Tube-to-tube center distance is 12 cm, fin thickness is 0.05 cm, tube diameter is 1.5 cm, and fluid-tube heat transfer coefficient is 1000 W/m2K. The cover transmittance to solar radiation is 0.8 and is independent of direction. The solar absorptance of the absorber plate is 0.9, the collector is 1 m wide and 2 m long, and the water flow rate is 0.03 kg/s. The water temperature is 330 K.
In: Mechanical Engineering
CoR Stock
|
Scenario |
Probability of Scenario |
Rate of Return |
|
Worst Case |
0.10 |
−11% |
|
Poor Case |
0.20 |
−4% |
|
Most Likely |
0.40 |
−2% |
|
Good Case |
0.20 |
8% |
|
Best Case |
0.10 |
14% |
In: Finance
The following problem description applies also to the next two problems.
A piston-cylinder device contains 2 kg of a saturated liquid mixture at an initial state 1 with p1= 100 kPa and x1= 0.8. The water is heated at constant pressure until its final state 2 with volume V2 = 1.947V1.
Its initial volume, in m3/kg, is closer to:
A) 3.836
B) 1.294
C) 2.990
D) 2.345
E) 2.156
F) 2.711
G) 4.625
H)1.736
B) Its final temperature, in oC, is closer to:
C) The amount of heat supplied to the steam during the expansion process, in kJ, is closer to:
In: Mechanical Engineering
Consider an economy in which the consumption, investment and production functions are as follows
C = 10 + 0.8(Y - T)
I = 40 - 2.5r
F(K,L) = K1/3 L2/3
Suppose government spending is 20, taxes equal 25 and the supply of factors is KS = LS = 125. Answer the following questions.
In: Economics