The lengths of earthworms are normally distributed with a mean of 3.2 inches
and a standard deviation of 0.8 inches.
A. What is the probability that a sample of 40 worms has a mean length of at least 3 inches?
B. What is the probability that Freddy the earthworm is between 2.5 in and 4.0 in long?
C. If I dig up a random sample of 25 earthworms, what is the probability that the mean nl _______
length in the sample would be less than 3.5 inches?
In: Statistics and Probability
o test H0:σ=1.2 versus H1:
σ≠1.2, a random sample of size n=22 is obtained from
a population that is known to be normally distributed.
(a) If the sample standard deviation is
determined to be s=0.8, compute the test
statistic.
(b) If the researcher decides to test this
hypothesis at the α=0.10 level of significance, determine
the critical values.
(c) Will the researcher reject the null
hypothesis? Why?
that's all the question stated
In: Statistics and Probability
|
security |
beta |
Standard deviation |
Expected return |
|
S&P 500 |
1.0 |
20% |
10% |
|
Risk free security |
0 |
0 |
4% |
|
Stock d |
( ) |
30% |
13% |
|
Stock e |
0.8 |
15% |
( ) |
|
Stock f |
1.2 |
25% |
( ) |
3) If stock F has an average return of 12%,
1. find the expected return based on CAPM equation and beta 1.2
2. find the abnormal returns, alpha
In: Finance
Determine the value z* that satisfies the conditions below. (Round all answers to two decimal places.)
(a) Separates the largest 3.2% of all z values from the
others
z* =
(b) Separates the largest 0.8% of all z values from the
others
z* =
(c) Separates the smallest 5.6% of all z values from the
others
z* =
(d) Separates the smallest 12.1% of all z values from the
others
z* =
In: Statistics and Probability
A reheat Rankine cycle operates with water as the working fluid. Steam enters the first turbine at 8 MPa and 450◦C and exits at 0.8 MPa. It is then reheated at 400◦C before entering the second turbine, where it exits at 10 kPa. If the amount of work into the pump is 8.04 kJ/kg and the net work per cycle produced is 1410.5 kJ/kg, determine the thermal efficiency. Assume no pressure losses in the condenser or the boiler.
In: Mechanical Engineering
A rigid reservoir with 3 m3 volume is connected to a supply
line.
Initially the valve is closed and the reservoir contains steam at
800 kPa, and x = 0.8 quality.
The valve is opened and steam is allowed until the final pressure
is 2.5 MPa and 250 oC.
a- Determine the mass of steam entered to the reservoir.
b- If the pressure is 3.5 MPa and temperature is 350oC at the
supply line, evaluate the
transferred heat in kJ, and determine the direction of the
heat.
In: Mechanical Engineering
A rigid reservoir with 3 m3 volume is connected to a supply line.
Initially the valve is closed and the reservoir contains steam at 800 kPa, and x = 0.8 quality.
The valve is opened and steam is allowed until the final pressure is 2.5 MPa and 250 C.
a- Determine the mass of steam entered to the reservoir.
b- If the pressure is 3.5 MPa and temperature is 350 C at the supply line, evaluate the transferred heat in kJ, and determine the direction of the heat.
In: Mechanical Engineering
In: Civil Engineering
|
Division |
Revenues |
Profits |
% profit |
RMSP |
IGR% |
|
Midland |
250 |
75 |
0.6 |
10 |
|
|
Odessa |
500 |
90 |
0.8 |
-2 |
|
|
Abilene |
125 |
18 |
0.4 |
7 |
|
|
IGR% |
industry growth rate percent 2% |
||||
|
RMSP |
relative market share posotion in the industry |
||||
In: Operations Management
Q-1
# of workers Output (flags(
0 0
1 50
2 110
3 180
4 260
5 350
The table shows the number of flags that can be made per month depending on the number of workers at Acme Flag Company. Does the Acme Flag Company experience the law of diminishing returns in the table above?
| a. |
No, because marginal product is increasing as more workers are added. |
|
| b. |
Yes, because marginal product is decreasing as more workers are added. |
|
| c. |
Yes, because total product is increasing as more workers are added. |
|
| d. |
Yes, because total product is decreasing as more workers are added |
Q-2
The major characteristic of a monopoly is
| a. |
the degree of control over price it can exercise. |
|
| b. |
the ability to produce numerous products. |
|
| c. |
its price elasticity of demand. |
|
| d. |
its source of revenue |
Q-3
Ceteris paribus, the demand curve faced by a firm that is a monopoly will be ______the demand curve faced by a firm in perfect competition.
| a. |
less steep than |
|
| b. |
more steep than |
|
| c. |
the same steepness as |
|
| d. |
the opposite of |
Q-4
As output increases, marginal cost
| a. |
continually increases. |
|
| b. |
continually decreases. |
|
| c. |
increases, reaches a maximum and then declines. |
|
| d. |
decreases, reaches a minimum and then rises. |
Q-5
# of workers Output (flags)
0 0
1 50
2 110
3 180
4 260
3 350
The table shows the number of flags that can be made per month depending on the number of workers at Acme Flag Company. The price that Acme can charge for flags is $20. What is the average product of the 4th worker?
| a. |
65 flags. |
|
| b. |
80 flags. |
|
| c. |
260 flags. |
|
| d. |
$1600 |
Q-7
Long-run competitive equilibrium implies that
| a. |
all firms in the industry are earning economic profits. |
|
| b. |
all firms in an industry are producing output at the point where marginal profit equals marginal cost. |
|
| c. |
there is no incentive for firms to enter or leave an industry. |
|
| d. |
the accounting profits of all firms in a competitive industry are zero. |
Q-9
Which of the following statement is true?
| a. |
Diminishing returns occur when a firm can change the amount of all the factors of production it uses. |
|
| b. |
if Helena finds that the marginal benefit of eating an ice cream cone is equal to the marginal cost of eating an ice cream cone, then Helena would be better off to eat one more ice cream cone. |
|
| c. |
the production possibilities curve is positively sloped. |
|
| d. |
none of the above are true statements |
Q-11
A price ceiling _______ output and ________ price in a monopoly market.
| a. |
increase; increase. |
|
| b. |
decrease; increase. |
|
| c. |
decrease; decrease. |
|
| d. |
increase; decrease |
Q-13
Economic theory suggests that a monopoly is the best form of business organization when
| a. |
a natural monopoly exists. |
|
| b. |
the average cost curve is downward sloping over the relevant range of output levels. |
|
| c. |
a single firm is able to produce output at a lower average cost than would occur if there were two or more firms in the industry. |
|
| d. |
all of the above. |
Q-15
If a local movie theater is a monopolist, price discrimination means that;
| a. |
economic profits earned by the theater will redistribute income from consumers to resource owners. |
|
| b. |
the theater can charge different prices for its product in different markets. |
|
| c. |
the theater's price/output decision results in an unequal distribution of income. |
|
| d. |
the theater can charge a higher price than a competitive firm. |
Q-16
Monopolies generally offer consumers ___ and ____ than competitive firms.
| a. |
lower output; lower prices. |
|
| b. |
lower output; higher prices. |
|
| c. |
higher output; lower prices. |
|
| d. |
higher output; higher prices |
Q-16
f output changes in fixed proportion to a change in all of a firm's productive resources, the firm has
| a. |
constant marginal returns. |
|
| b. |
constant returns to scale. |
|
| c. |
decreasing marginal returns. |
|
| d. |
decreasing returns to scale. |
Q-17
Profits for the profit maximizing monopolist will equal
| a. |
marginal cost times output. |
|
| b. |
price minus average total cost, times output. |
|
| c. |
zero economic profit most of the time. |
|
| d. |
price minus marginal cost, times output. |
Q-18
Unlike a firm in perfect competition, a monopolist may be able to
| a. |
block the entry of new firms into the industry. |
|
| b. |
continue to an economic profits in the long run. |
|
| c. |
earn economic profits in the short rum |
|
| d. |
both (a) and (b). |
20
he point of diminishing returns occur at the point where
| a. |
the slope of the total product curve is zero. |
|
| b. |
the slope of the total product curve is negative. |
|
| c. |
the slope of the total product curve is positive. |
|
| d. |
the slope of the total product curve begins decreasing. |
In: Economics