Thursday
September 18, 2014

Posts by PsyDAG


Total # Posts: 18,195

stats
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 "...
June 20, 2014

Science
Molecules, atoms, protons, neutrons and electrons?
June 19, 2014

epi (?)
What diagram?
June 19, 2014

math
All correct.
June 19, 2014

math
Most of Steve's answers do not fit the requirement of "The digit in my hundreths place is one less than the digit in my thousansths place."
June 18, 2014

math
.189 .178 .156 .145 .134 .123 Which do you want to use?
June 18, 2014

science
x * 15 * 6 = 216 Solve for x.
June 18, 2014

math (?)
Gets what?
June 18, 2014

math (?)
What is your question?
June 18, 2014

math
(5 * 24) + 8 = ?
June 18, 2014

ENGLISH 111
What is your area of interest? Enjoyment of the date? Repeated dating? Leading to a permanent relationship? Whichever: Online dating is (not) as satisfactory as traditional dating.
June 18, 2014

finite math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
June 17, 2014

finite math
.445
June 17, 2014

math
No figure shown. You cannot copy and paste here.
June 17, 2014

math
Use process indicated in previous posts.
June 17, 2014

math
Transpose two values on the left-hand side of the equation. -x = 48675 - 57865 - 23129 = ? Then multiply both sides by -1.
June 17, 2014

math
Transpose two values on the left-hand side of the equation. x = 2240 - 5277 + 9384 = ?
June 17, 2014

Statistics
A. .9498 E. (454+741+1058)/(478+833+1644) = ?
June 16, 2014

math
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Also, it would help if you proofread your questions before you posted them. How many of each color? How specifically do you want it rounded?
June 16, 2014

algebra
Add the two equations to cancel out y. 5x = -15 You should be able to work it from there.
June 16, 2014

Statistics
What is the standard deviation? T = 50 + 10SD
June 16, 2014

Algebra
Add the two equations. -x = 2 -4 - y = -1 y = ?
June 16, 2014

science:biology
They all carry blood.
June 16, 2014

statistics for health research
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 the Z scores.
June 16, 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.
June 16, 2014

Psychology?
Person
June 15, 2014

Math
"<" indicates that the previous value is LESS than the following value. ">" indicates that the previous value is MORE than the following value.
June 15, 2014

Algebra II
a and b. Anything to the first power ("^1") is that value, 100^1 = 100. c. There is a middle (xy) term missing. d. The x^2 values combine but do not cancel each other out.
June 15, 2014

psychology
What information do you want from us? Here is a guess. https://www.google.com/search?client=safari&rls=en&q=correlation+coefficient&ie=UTF-8&oe=UTF-8&gws_rd=ssl
June 14, 2014

Algebra
(x-3)(x+5) = ?
June 13, 2014

Anatomy
https://www.google.com/search?client=safari&rls=en&q=model+of+blood+flow+through+the+heart&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/...
June 13, 2014

psychology (?)
To what question?
June 13, 2014

Anatomy
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.
June 13, 2014

science cant figure it out
Since this is not my area of expertise, I searched Google under the key words "pace of evolutionary change" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=pace+of+evolutionary+change&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you...
June 12, 2014

algebra (?)
What is your question?
June 12, 2014

Math
It would help if you proofread your questions before you posted them. Online "^" is used to indicate and exponent, e.g., x^2 = x squared. Online, “*” is used to indicate multiplication. 7-9. Correct. 10. There is no equation. Equation requires equal sign...
June 10, 2014

Math
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.
June 10, 2014

Maths
How do you expect use to help you on this message board?
June 10, 2014

algebra
4^3 - 5(4)^2 + 4 = 64 + 80 + 4 = ?
June 10, 2014

statistics (?)
What "lines below"?
June 9, 2014

statistics
There is no relationship.
June 9, 2014

Math (?)
Data missing.
June 9, 2014

biology
After 30 minutes = 2, after 60 = 4, after 90 = 8.
June 9, 2014

biology
After 30 minutes = 2, after 60 = 4, after 90 = 6.
June 9, 2014

algebra (?)
What is your question? With two unknowns, cannot solve without more data.
June 8, 2014

Psychology
If you cannot understand the above site, possibly this might help. Use the Chi-square (X^2) method. X^2 = ∑ (O-E)^2/E, where O = observed frequency and E = expected frequency. ∑ = sum of all the cells. E = (column total * row total)/grand total df = n - 1, where n...
June 8, 2014

algebra (?)
What following?
June 8, 2014

math
What criteria would you use to indicate "better"?
June 8, 2014

Mathematics (?)
No graph. No question.
June 8, 2014

Math
Right.
June 8, 2014

Math
3x + 40 = 2(x+17) = 2x + 34 x = -6 4(-6 -9) = ?
June 8, 2014

Math (?)
What statements? You cannot copy and paste here. Just guessing: Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to your Z scores.
June 8, 2014

Stats
a - d. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores. e. Reverse process, starting with .25 and its Z score
June 7, 2014

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.01 for two-tailed) and its Z score (score in terms of standard deviations). 98% = mean ± 2.33 SEm SEm = SD/√n
June 6, 2014

math-roskdale (?)
Scale lacking. The Z score is the raw score in terms standard deviations (SD). It is one type of standard score, cutting off the same percentages for any normal distribution. Z = (score-mean)/SD Find the mean first = sum of scores/number of scores Subtract each of the scores ...
June 6, 2014

math
95% = mean ± 1.96 SEm SEm = SD/√n
June 5, 2014

statistics
https://www.google.com/search?client=safari&rls=en&q=difference+between+small+and+large+samples&ie=UTF-8&oe=UTF-8&gws_rd=ssl
June 5, 2014

algebra
Do you have a typo? "4x-4x" = 0 They cancel each other out.
June 5, 2014

math question
Agree
June 5, 2014

English
I would pick B.
June 5, 2014

math (?)
What is "it"?
June 5, 2014

Math
The Richter Scale is logarithmic, 5-2 = 3. 10^3 = 1000
June 5, 2014

lıfe scıence (?)
What kind of milk and cereal? How big is a serving?
June 5, 2014

lıfe scıences
Since this is not my area of expertise, I searched Google under the key words "importance of sodium in diet" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=importance+of+sodium+in+diet&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, ...
June 5, 2014

lıfe scıences (?)
What packet?
June 5, 2014

MATH
Multiply by 4. 6x + x - 2 = 40 Combine terms. 7x = 42 You should be able to take it from here.
June 4, 2014

math (?)
I have no idea what you are referring to. Lack needed data.
June 4, 2014

random question about writing
If nobody is available to proofread your work, you can do this yourself. After writing your material, put it aside for a day — at least several hours. (This breaks mental sets you might have that keep you from noticing problems.) Then read it aloud as if you were reading ...
June 3, 2014

math
Z = (score-mean)/SD Consult your table with the Z score. Multiply by 60.
June 3, 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 the Z score.
June 3, 2014

Scientific nottion
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Online "^" is used to indicate and exponent, e.g., x^2 = x squared. 3.0 * 10^6
June 3, 2014

Science Plzz Help
disagree
June 3, 2014

math (?)
No column data given. Cannot copy and paste here.
June 3, 2014

math!!
8.58/9 = ?
June 3, 2014

statistics
From your data, it looks like 84 took politics and 16 took history. There is no information to indicate how many took both.
June 3, 2014

Meiosis and mitosis
Only half, so combining egg and sperm does not double the number of chromosomes.
June 3, 2014

algebra
Total bill = 1.13 * meal
June 3, 2014

biology (?)
Who is mating with whom? For example AA with AA, all offspring would be AA.
June 3, 2014

PLEASE HELP CHECK ANSWER SCIENCE
agree
June 2, 2014

college algebra
If w = width, then length = w + 20 w(w+20) = 8000 Solve for w, then length.
June 2, 2014

Two numbers with exponents??
When multiplying, add the exponents. 3^36
June 2, 2014

Science Plzz Help
agree.
June 2, 2014

Algebra
We cannot graph here. Put various values for x and solve for y. Put these on a scatterplot to graph. I'll start you out. if x = 0, 4y > 20, y > 5.
June 2, 2014

algebra
Assuming there is no difference between capitals and lower case: When dividing exponents, you subtract their value. x^7 h^9
June 2, 2014

math (?)
It would help if you proofread your questions before you posted them. No data on shirt. If you mean shoes, (1-.30)45 = ?
June 2, 2014

algebra
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 the Z score.
June 1, 2014

Science
1. A 2. C 3. D 4. B 5. D
June 1, 2014

SCI 207 (?)
Lacking data. What cycles?
June 1, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "abiotic factor ecosystem" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=abiotic+factor+ecosystem&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
June 1, 2014

biology
Since this is not my area of expertise, I searched Google under the key words "insulin glycogen homeostasis" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=insulin+glycogen+homeostasis&ie=UTF-8&oe=UTF-8 In the future, you can find...
May 31, 2014

Health insurance (?)
What is your question?
May 30, 2014

Statistic
To do the calculations yourself for 3 and 4: Range = highest score - lowest 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 ...
May 30, 2014

Algebra
-9 -3 + 9 - 7 = -10
May 30, 2014

Algebra
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. (-5)(-8) - (6*6) = 40 - 36 = 4
May 30, 2014

Algebra/I think I did this wrong
Z = (score-mean)/SD = (180-170)/5 = 2 a. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between score and mean for Z score. Multiply by 50 ≠ 29 b. Z = (176-170)/5 = 6/5...
May 30, 2014

Simplify Polynomials
Don't know about "7ft1". Combine like terms. -2x^2 + x + 3
May 30, 2014

Algebra 2
What are your formulas?
May 30, 2014

bio
Is the PKU gene represented by P or p? If the latter, C is correct for the last statement. Cannot respond to first two questions, because parental genotypes are not given.
May 30, 2014

Algebra 2
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.
May 29, 2014

statistics
https://www.google.com/search?client=safari&rls=en&q=confidence+intervals+inferential+statistics&ie=UTF-8&oe=UTF-8
May 29, 2014

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