Use the following information on states of the economy and stock returns to calculate the standard deviation of returns. (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.)
| State of Economy | Probability of State of Economy |
Security
Return if State Occurs |
||||||||||
| Recession | .35 | −10.00 | % | |||||||||
| Normal | .50 | 7.00 | ||||||||||
| Boom | .15 | 17.00 | ||||||||||
In: Finance
10. Newton’s law of cooling states that the temperature of an
object changes at a rate proportional to the difference between the
temperature of the object an the temperature of its
surroundings.
(a) Write a differential equation for the temperature of the object
at any time.
b) State the dimensions of the constant of proportionality, and
its SI units.
C) Plot the direction field for the DE and find the limiting
behaviour of solutions. If this limit depends on the initial
temperature T(0) explain.
pls include the direction fields. Thank you
In: Advanced Math
Dalton's law states that the total pressure, Ptotal, of a mixture of gases in a container equals the sum of the pressures of each individual gas: Ptotal=P1+P2+P3+… The partial pressure of the first component, P1, is equal to the mole fraction of this component, X1, times the total pressure of the mixture: P1=X1×Ptotal The mole fraction, X, represents the concentration of the component in the gas mixture, so X1=moles of component 1total moles in mixture
Part A Three gases (8.00 g of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 ∘C, the total pressure in the container is 5.40 atm . Calculate the partial pressure of each gas in the container. Express the pressure values numerically in atmospheres, separated by commas. Enter the partial pressure of methane first, then ethane, then propane.
Part B A gaseous mixture of O2 and N2 contains 33.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 825 mmHg ? Express you answer numerically in millimeters of mercury.
In: Chemistry
A school states that average tuition of their training program for various certifications taught there is $995 with a standard deviation of $100. You are not sure which course to take and just decided to enroll in a certificate course at random.
What is the probability that the tuition for the course is between $900 and $1050?
You plan to register for 9 certifications. What is the probability that the average price of certifications is between $900 and $1050?
In: Statistics and Probability
A school states that average tuition of their training program for various certifications taught there is $995 with a standard deviation of $100. You are not sure which course to take and just decided to enroll in a certificate course at random.
What is the probability that the tuition for the course is between $900 and $1050?
You plan to register for 9 certifications. What is the probability that the average price of certifications is between $900 and $1050?
In: Statistics and Probability
A school states that the standard deviation of tuition of their training program for various certifications taught there is $100. You want to prepare a 95% confidence interval of the average tuition for courses. You took a sample of 25 courses and found that the average tuition is $891. Prepare a 95% confidence interval for average tuition for certificate programs at the school.
In: Statistics and Probability
1.
Petunia purchases a piece of property with a deed that states "neither the owner of this property nor his/her heirs, successors or assigns shall ever erect a slaughter house on this property". This clause is known as:
|
a. |
a restrictive covenant |
|
|
b. |
a non-possessory interest in land |
|
|
c. |
an easement |
|
|
d. |
an illegal covenant |
2.
To be negotiable, a check must be in writing. This means:
|
a. |
a check must be written on standard size paper of 6" x 2.5" |
|
|
b. |
a check must be written on an official bank form |
|
|
c. |
a check can be written on anything tangible and portable |
|
|
d. |
both (a) and (b) are required but not (c) |
3. Which type of defense can be raised against both holders and holders in due course?
a. personal
b. omni defense
c. real
d. non of the above
4. Jed is a tree farmer. Every November, he allows the local boy scouts to chop down 100 trees and sell them for Christmas to raise money for the boy scouts. What interest has Jed given to the boy scouts?
|
a. |
license |
|
|
b. |
easement |
|
|
c. |
profit |
|
|
d. |
right of redemption |
5.
An accommodation party:
|
a. |
must receive consideration |
|
|
b. |
may be primarily liable on the instrument |
|
|
c. |
is always secondarily liable on the instrument |
|
|
d. |
does not agree to pay the instrument if the maker doesn't |
In: Economics
A random sample of the number of farms (in thousands) in various states follows. Estimate the mean number of farms per state with 99% confidence. Assume o= 31.
16 48 79 44 49 3 90 80 9 57 8
4 64 33 54 95 47 50 40 109
A random sample of 45 four-year-olds attending day car centers provided a yearly tuition average $3850 and the population standard deviation of $620.
If day care center were starting up and wanted to keep tuition
low, what would be a reasonable amount to charge.
round to nearest hundred.
If the variance of the water temperature in a lake is 32
degrees, how many days should the researcher select to measure the
temperature to estimate the true mean within 4 degrees with 90%
confidence
The researcher needs a sample of at least ____ days (its NOT 5
days)
A random sample of 43 cars in the drive-thru of a popular fast
food restaurant revealed an average bill of $19.99 per car. The
population standard deviation is $6.49. Estimate the mean bill for
all cars from the drive-thru with 91% confidence.
_____ < u < ____
For a random sample of 70 overweight men, the mean of the number of pounds that they were overweight was 28. The standard deviation of the population is 3.9 pounds.
a. the best point estimate of the mean is _____ pounds
b. Find the 95%, 90%, 99% confidence interval
c. Find 80%, 85% interval
d. Which interval is larger
In: Statistics and Probability
manufacturer of colored candies states that
1313%
of the candies in a bag should be brown,
1414%
yellow,
1313%
red,
2424%
blue,
2020%
orange, and
1616%
green. A student randomly selected a bag of colored candies. He counted the number of candies of each color and obtained the results shown in the table. Test whether the bag of colored candies follows the distribution stated above at the
alpha equalsα=0.050.05
level of significance.
LOADING...
Click the icon to view the table.
Determine the null and alternative hypotheses. Choose the correct answer below.
A.
H0:
The distribution of colors is the same as stated by the manufacturer.
H1:
The distribution of colors is not the same as stated by the manufacturer.This is the correct answer.
B.
H0:
The distribution of colors is not the same as stated by the manufacturer.
H1:
The distribution of colors is the same as stated by the manufacturer.
C.
None of these.
Your answer is not correct.
Compute the expected counts for each color.
|
Color |
Frequency |
Expected Count |
|
|---|---|---|---|
|
Brown |
5959 |
49.66 49.66 |
|
|
Yellow |
6464 |
53.48 53.48 |
|
|
Red |
5555 |
49.66 49.66 |
|
|
Blue |
6262 |
91.68 91.68 |
|
|
Orange |
7878 |
76.40 76.40 |
|
|
Green |
6464 |
61.12 61.12 |
|
|
(Round to two decimal places as needed.) |
|||
What is the test statistic?
|
chi Subscript 0 Superscript 2χ20 |
equals= |
In: Statistics and Probability
A courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the true proportion is 0.05.
If 219 are sampled, what is the probability that the sample proportion will differ from the population proportion by more than 0.03? Round your answer to four decimal places.
In: Statistics and Probability