Tuesday
November 25, 2014

Posts by PsyDAG


Total # Posts: 18,731

Algebra
Yes, π.
October 14, 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.
October 14, 2014

math
8/20 = x/40,000 Calculate for x.
October 14, 2014

algebra
-18 + 6n = 60 Add 18 to both sides, then divide by 6.
October 14, 2014

math
Factor 24 = 2 * 2 * 2 * 3 12 for 2 piles or 2 for 12 piles 6 and 4 = ? 8 and 3 = ?
October 14, 2014

statistics
Ho: Smoking has no effect on pregnancy Ha: Smoking causes premature birth
October 14, 2014

Math
If x = -4, then 10 -5(-4) = 10 + 20 = 30 (2,10) would be the solution. y = 15 + 10x
October 14, 2014

Photography
Agree.
October 14, 2014

math school g
1500 + 800 + 8000 = 10,300 for 8 panels 3200 - 10,300/2 (for four panels) = 3200 - 5150 = -1950 -1950/5150 * 100 = ? Salman won't be in business very long.
October 14, 2014

math
p = 100m/2
October 13, 2014

statistics
92,000 - 12,500 = 79,500 79,500/8 = 9,937.5 Have each interval 10,000 and start just below 12,500.
October 13, 2014

Math
What is your question?
October 13, 2014

Statistics and Probability
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/51 * 1/50 * 1/49 * 1/15 = ?
October 13, 2014

Math
1. x + y > 5 2. x > 1 3. 200x + 100y < 700 Cannot graph here.
October 13, 2014

statistics
Z = (score-mean)/SD Since I don't know the mean or SD, I can't help you find the raw score. Also, your values don't make sense. Do you mean: Z = 11.22 and Z = 20.48? If so, those are extremely deviant values. If not, you need to clarify your data.
October 12, 2014

Algebra 2
15 + .40m = 30 + .25m Calculate m. Once you find m, insert its value on either side to answer the last question.
October 11, 2014

Biology
Since this is not my area of expertise, I searched Google under the key words "contractions in digestive system" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=contractions+in+digestive+system&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the ...
October 11, 2014

statistics
Assuming a normal distribution, if the mean (m) = 50, no value of standard deviation (s) would make 55 a measure of central tendency. If the distribution is skewed, s has no definite meaning. However, the mode or median could be 55.
October 11, 2014

statistics
I thought I answered this previously. If the Z scores are equal, he did equally well on both exams.
October 11, 2014

statistics
It depends on the mind set of the participants in each group. If they see themselves competing against other groups, they will do their best to help each other. However, if they view themselves as competing with others within the group, there may be sabotage or at least a lack...
October 11, 2014

statistics
a) 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 b) Z = (score-mean)/SD...
October 11, 2014

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.25) in the smallest area for the Z score.
October 11, 2014

statistics
If the Z scores are the same, he did the same on both.
October 10, 2014

Science
Right.
October 10, 2014

word problem math b
km = 1000m 20,000 m/80 minutes = 250m/minute
October 10, 2014

equation
a+b : (2a +2b) = a+b : 2(a + b) = 1 : 2
October 10, 2014

Help Ms.Sue
Multiply by 12. 12/4 : 12/3 : 12(13/12) = 3 : 4 : 13
October 10, 2014

Pre algebra
1296 = 16 t^2 Divide both sides by 16. 81 = t^2 Get square root of both sides.
October 10, 2014

Algebra
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. What is your question? 5/2 ≠ 46/3 Second equation is correct.
October 10, 2014

Biology
Since this is not my area of expertise, I searched Google under the key words "homeostasis in cells" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=homeostasis+in+cells&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
October 10, 2014

Statistics
What is your question?
October 10, 2014

Nominal Data Be skewed?
You are correct; they cannot be skewed. http://drdavespsychologypage.homestead.com/Two___Two_____four.pdf
October 10, 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 (.05) and its Z score. Put values into above equation and solve for raw score.
October 9, 2014

Math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 2,724 * 588 = 1,601, 712 3000 * 600 = 1,800,000
October 9, 2014

Math
I get 10.84 * 10^24 = 1.084 * 10^25 A and D are the same, except for the notation.
October 9, 2014

Math
$25 - $18 = $7 still owed. $7 + $18 = $25
October 9, 2014

Math
No, which has the higher power of 10?
October 9, 2014

Math
Yes.
October 9, 2014

Science
Yes.
October 9, 2014

Algebra 2
Lacking data.
October 9, 2014

math!
x = W 2x = L x-3 = H H * L * H = volume
October 9, 2014

Math Need Help. No Idea how to solve
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. 95% = mean ± Z SEm SEm = SD/√n
October 8, 2014

Sociology (Statistics) Confidence Level
95% = mean ± 1.96 SEm SEm = SD/√n = 1/√35 = 1/5.92 = .17 .17 * 1.96 = .33 95% = mean ± 1.96 SEm = 3 ± .33 = 2.67-3.33 Rounding error?
October 8, 2014

statistics
Parameters are data on total populations, while statistics are data on portions of a population (samples).
October 8, 2014

statistics
From your data, he did equally well on both exams.
October 8, 2014

statistics
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. Second equation has wrong SD.
October 8, 2014

MATH (STATS)
A) SEm = SD/√n B) 95% = mean ± 1.96 SEm C) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.005) and its Z score. Substitute that for the 1.96 in B equation.
October 8, 2014

Algebra
What problem?
October 8, 2014

statistics
22 is two SD below the mean, in other words, Z = -2. 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 and distance from the mean. ...
October 8, 2014

Statistics-Help please??
Was this the equation they gave you? Z = (score-mean)/SD Just insert values and solve for Z.
October 8, 2014

statistics
What is your question?
October 8, 2014

Sociology (stats) help
Continue calculations to find Z. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the least proportion/probability for each Z score. Either-or probabilities are found by adding the ...
October 8, 2014

Psychological Statistics
Z = (score-mean)/SD Insert you data to calculate the mean.
October 8, 2014

General Psychology
Nicotine
October 8, 2014

psychology
http://drdavespsychologypage.homestead.com/Decision_Trap.pdf
October 7, 2014

psychology
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.
October 7, 2014

Statistics
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 later post.
October 7, 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.
October 7, 2014

Science
I would agree.
October 7, 2014

Satistics
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 (.10) and its Z score. Insert all data in above equation.
October 7, 2014

statistics
Z = (score-mean)/SD Compare the two Z scores.
October 7, 2014

Stats
Probability cannot be negative or greater than 1.
October 7, 2014

math
What are your choices?
October 7, 2014

science
https://www.google.com/search?client=safari&rls=en&q=speed+of+a+falling+object&ie=UTF-8&oe=UTF-8&gws_rd=ssl
October 4, 2014

Algebra
x^2 + 4x - 10 = 0 Ten factors into 2 and 5. If you had a typo: x^2 + 3x - 10 = 0 This factors into (x+5)(x-2) = 0 Do you have a typo?
October 4, 2014

statistics
.01/3 = ?
October 4, 2014

statistics
Where? Grade book?
October 4, 2014

Math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Yes, -7 * -7 * -7 * -7 * -7
October 4, 2014

math
1000 - 310 - 180 = B
October 4, 2014

Statistic
What figure? What is your question?
October 3, 2014

Math
x - .32x = 120 Solve for x.
October 3, 2014

Math
Horizontal axis (X axis, abscissa) is the values of the scores, while the vertical axis (Y axis, ordinate) would indicate the frequency of each score. I hope this helps.
October 2, 2014

Biology
https://www.google.com/search?client=safari&rls=en&q=protein+synthesis+importance&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/searchtools/.
October 2, 2014

Biology
https://www.google.com/search?client=safari&rls=en&q=product+of+the+oxidation+of+methanol&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/...
October 2, 2014

statistics
Unbiased estimators can be generalized more accurately.
October 2, 2014

writing,essay
How do you know who you are without knowledge of your past? How do you define yourself? Think about it.
October 2, 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.
October 2, 2014

math
120/5 units by 75/5 units
October 1, 2014

math
Any negative number squared is positive. (-x)^4 = (-x)^2 * (-x)^2 If a is -(x^4), then it is negative. The only other negative I see is e.
October 1, 2014

Biology
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. https://www.google.com/search?client=safari&rls=en&q=factors+affecting+...
October 1, 2014

Stat
99% = mean ± Z*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 (.005) and its Z score. Insert Z score with other data in the first equation.
October 1, 2014

Statistics
From the way you posted, I cannot understand your data. However…. 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 each Z score.
October 1, 2014

Health
Agree, however, it does effect the adrenal glands via ACTH, Adrenocorticotropic hormone.
October 1, 2014

statistics
Then you have a bimodal distribution; use both modes.
October 1, 2014

Science
https://www.google.com/search?client=safari&rls=en&q=science+indicators&ie=UTF-8&oe=UTF-8&gws_rd=ssl
October 1, 2014

Math
Need to convert meters to feet. 4m = 13.12 feet She has two rolls. 2 * 13.12 = 26.24 She needs the amount below to connect the speakers. 2*2 + 2*11 = ? Convert discrepancy from feet to cm. 1 foot = 30.48 cm
October 1, 2014

Science quick question
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 other post.
September 30, 2014

Math
0 is the X value (abscissa, horizontal axis) and -2 is the Y value (ordinate, vertical axis).
September 30, 2014

Math
(180º-116º)/2 = ?
September 30, 2014

science
1 Knot = .5144 m/sec
September 30, 2014

Stat
Right.
September 30, 2014

Stat
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.005) and its Z score. 99% = mean ± Z SEm SEm = SD/√n
September 30, 2014

Communication
1-2. Agree 3. Disagree. Look up definition of prototype. 4. Agree 5. DK for sure, but would go with your answer. 6. Would go more with A 7. Disagree, when you marry someone are you biologically related? 8. Don't avoid conflicts. This would lead to long-term unexpressed ...
September 30, 2014

Human and social biology
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.
September 29, 2014

computers
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. However, to start you out, have you ever typed a paper on a manual/electric typewriter as ...
September 29, 2014

MATH HELP
Is there a 5 in the tens digit space?
September 29, 2014

Algebra
let x = # marbles in bag. 3x + 2 = 29 Solve for x.
September 29, 2014

Math
42 = 8x - 14 Add 14 to both sides, then divide both sides by 8.
September 29, 2014

math
lack sufficient data.
September 29, 2014

Logic?
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Correct.
September 29, 2014

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