Friday
October 31, 2014

Posts by PsyDAG


Total # Posts: 18,594

math
If the two digits are in their correct position, then the remaining two would be 1/10 * 1/10 = 1/100
August 25, 2014

science
Since this is not my area of expertise, I searched Google under the key words "Mirrors do not refract" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Mirrors+do+not+refract&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find ...
August 25, 2014

Mathematoics
5/15 + 6/15 = 11/15 1 - 11/15 = 4/15 4/15 * (1 -1/4) = 3/15 = 1/5
August 24, 2014

psychology
People concentrate on the emotions rather than the task at hand, so "I can't" becomes a self-fulfilling prophecy.
August 24, 2014

mat/156
A) p B) Either-or probabilities are found by adding the individual probabilities. p + c C) no see C, sí ?
August 23, 2014

Algebra
agree.
August 23, 2014

stat
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance Z = (score-mean)/SEm SEm...
August 23, 2014

stat
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. Is it significant?
August 23, 2014

Science
Agree.
August 22, 2014

Spanish
evoking a past age
August 22, 2014

math
S + L + J = 41 L + 5 = J L - 6 = S (L-6) + L + (L+5) = 41 Solve for L, then S and J.
August 22, 2014

Statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for the Z score. Multiply by 15.
August 22, 2014

statistics
a. average of April sample b. weight c. No data given
August 22, 2014

Science
Agree.
August 21, 2014

Sociology
This question is asking what YOU think.
August 21, 2014

Sociology
They both explain different aspects of societies. See http://drdavespsychologypage.homestead.com/Decision_Trap.pdf
August 21, 2014

Algebra 1
($1050 - $800)/7months = ?
August 21, 2014

algebra
Add the two equations. 12x = 6 Solve for x and then insert that value into one of the equation to find y. To check, insert x value into the other equation.
August 21, 2014

Health
Yes. At least that happens with my scale.
August 21, 2014

math algebra
2/100 * A = p
August 21, 2014

math algebra
6 * 1/2 = 3 hours
August 21, 2014

math
C = πd I don't see how the value for the circumference and diameter could both be 7. Do you have a typo?
August 21, 2014

math
Something does not make sense. If the boat is full while paying 10, wouldn't adding 3 students overload the boat? Also some data is missing. What is the total charge for the boat?
August 21, 2014

math
Let x = son's age, and y = father's age y = 7x y-2 = 13(x-2) = 13x - 26 Substitute 7x for y in the second equation. 7x - 2 = 13x - 26 Solve for x, then put that value into first equation. Check by putting both values into the second equation.
August 21, 2014

maths
A = 1/2bh 1.84 = 1/2b(1.6) Solve for b.
August 21, 2014

maths
A = 1/2bh 1/3 = x/A Insert values to solve for A, then x.
August 21, 2014

maths
To conceptualize the order, convert to decimals.
August 21, 2014

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
August 21, 2014

math
8/16575 = .000483
August 20, 2014

math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. For subsequent picks, the deck lacks one more card. 4/52 * 4/51 * 4/50 = ?
August 20, 2014

math
You don't indicate whether the remaining persons own bonds or neither bonds or stocks. If the former, I agree.
August 20, 2014

math
3x + 2(-2) = -7 Multiply. 3x - 4 = -7 Add 4 to both sides. 3x = -3 Divide by 3. x = -1
August 20, 2014

Math
Since it is two-tailed, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.05 rather than .10) and insert its Z score in the equation below. 90% = mean ± 1.645 SEm SEm = ...
August 20, 2014

math
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for each Z score.
August 20, 2014

biology
Yes, both do reproduce.
August 19, 2014

Science
agree.
August 19, 2014

statistics
The expected number would be 41/75 * 100 = 55, but I don't see data that would allow me to estimate a significant difference from that value.
August 19, 2014

math (?)
Lacking sufficient data.
August 19, 2014

statistics (?)
Where is the data?
August 19, 2014

statistics
I assume that you are talking about the standard error of the mean. SEm = SD/√n
August 18, 2014

Health
Agree.
August 18, 2014

Health
Agree.
August 18, 2014

math
L = 3W - 7
August 18, 2014

Biology
The metabolic differences are the answer. Birds are endothermic, while reptile are ectothermic.
August 18, 2014

life science
Wouldn't leaves lose water content more quickly? Relate that to adaptation.
August 18, 2014

statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to each Z score.
August 17, 2014

math
Yes, assuming x = # of minutes.
August 17, 2014

math
⁄Mia Culpa! Sorry.
August 15, 2014

math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. For blue = 4/6 * 3/5 = 2/5 For green = 2/6 * 1/5 = 1/10 Either-or probabilities are found by adding the individual probabilities...
August 15, 2014

Language
Me too.
August 14, 2014

Language
Sentence is correct.
August 14, 2014

Language
Right.
August 14, 2014

statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.8000) and its Z score. Insert Z score in the equation above and solve for score.
August 13, 2014

Biology: Genetics
Yes.
August 13, 2014

Biology: Genetics
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.
August 13, 2014

Biology (?)
Lack data. What previous four questions?
August 12, 2014

Earth Science
Although this is not my main area of expertise, I would agree.
August 12, 2014

psychology
She could also be a sociologist.
August 11, 2014

Stats
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though. What do you think the answers are?
August 11, 2014

POL201
Since this is not my area of expertise, I searched Google under the key words "idea of original intent" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=idea+of+original+intent&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can ...
August 11, 2014

Math
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score. This is for one student. With 3 students, the probability would be 3 times as likely. Either...
August 11, 2014

ENG 1511/101
Congrats on whatever goal you have achieved!
August 11, 2014

math
.15x + .75y = 297 (multiplied by 3) .15x + .05y = 108 Subtract second equation from first and work it from there.
August 10, 2014

Math
.9x - .6y = 12 .4x + .6y = 10/23 Add the two. 1.3x = 12 10/23 You should be able to work it from here.
August 10, 2014

maths
It would help if you proofread your questions before you posted them — "hundred digit its time the unit digit"? This is my best estimate: 862
August 10, 2014

Science needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
August 9, 2014

Math
Are you talking distance or time? http://www.cyberphysics.co.uk/topics/forces/stopping_distance.htm
August 9, 2014

math
https://www.google.com/search?client=safari&rls=en&q=median+test&ie=UTF-8&oe=UTF-8&gws_rd=ssl
August 9, 2014

math
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
August 9, 2014

science
Is there any wind to cause erosion?
August 9, 2014

Eng1511
You are welcome!
August 8, 2014

Eng1511
8A -This is great news indeed; I can't believe I made it! 6A -I am going home now; I wish I could get home before it starts to rain. http://www.grammarbook.com/punctuation/semicolons.asp Otherwise, it is fine.
August 8, 2014

Biology
Why would you plot (0, 0) if it is not one of your values?
August 7, 2014

Maths (?)
What is Your Question?
August 7, 2014

math
Scatter?
August 7, 2014

mathematics word problems
1/3x + 1/2x + 30 + 60 = x Change fractions to common denominator and solve for x.
August 7, 2014

statistics
Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled something like "...
August 7, 2014

statistics
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score.
August 7, 2014

Math
24/6 = ? = r C = 2πr^2
August 7, 2014

statistics (?)
What does c and d signify?
August 6, 2014

Computer needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
August 6, 2014

Psyc, statistics
This should help: http://drdavespsychologypage.homestead.com/Proving_a_Point.pdf
August 6, 2014

Interpersonal Communication
The first two qualities benefit, while the last two negate interpersonal communication.
August 6, 2014

Psychology
"If people define situations as real, they are real in their consequences." W. I. Thomas, 1923
August 6, 2014

science
There are two independent variables — foods and temperature, with whatever criterion you want to indicate the cooking results as the dependent variable.
August 5, 2014

Stat
a. In a normal distribution, 50% are above the mean. For confidence interval, 95% = mean ± 1.96 SEm b. Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find ...
August 5, 2014

Chemistry
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. What is your question?
August 4, 2014

Statustics
a. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between the two Z scores. Multiply by 100 to get %. b. Find table in the back of your statistics text ...
August 4, 2014

statistics (?)
No data given.
August 3, 2014

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.025) and its Z score = 1.96. 95% = mean ± 1.96 SEm
August 2, 2014

statistics
Yes and Yes.
August 2, 2014

statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for that Z score. For the sample mean, Z = (score-mean)/SEm SEm = SD/√n Use same table for the Z scores.
August 2, 2014

math
I see 8 positons, which include both before and after all the consonants and the present one.
August 2, 2014

statistics
You would have 8 cells. With such a small sample, you will need a correction for that fact. http://udel.edu/~mcdonald/statsmall.html
July 31, 2014

Finance needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. I would need definitions of M1, M2 and M3, since I don't have the Fed definitions.
July 31, 2014

Statistics (?)
It would help if you proofread your questions before you posted them… "a _____ level"? If you mean alpha error level, the statement is true. The less likely error is, the more confident you can be.
July 30, 2014

Research Methods
As long as the distribution is normal, the SD cuts off particular percentages. As the distribution deviates from normal, these percentages no longer apply.
July 30, 2014

English
https://owl.english.purdue.edu/owl/resource/747/02/
July 29, 2014

PUBLIC SPEAKING
"informative" is all it does.
July 29, 2014

maths lit,life science,economics,history
It's your decision. However, consulting a guidance counselor will help you make your decisions, since your interests will probably fit more than one career. They have interest tests that should help you decide. Even so, you still would need to acquire the skills related to...
July 29, 2014

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