Thursday
August 21, 2014

Posts by PsyDAG


Total # Posts: 17,966

5th grade math help
Where did you get "10" from? 3w + 7g = ?
September 10, 2013

Math - Number Properties
6 + 5 = ?
September 10, 2013

science (?)
It would help if you proofread your questions before you posted them. Inadequate data.
September 10, 2013

Math
17. a -17 = 11- 17 ≠ -28 18. Right 19. Right 20. b - a = 8 - 11 ≠ 19 22. Right 23. Right 24. Right 25. c - a -b = -6 -11 -8 ≠ -3 28. c - a + b = -6 -11 + 8 ≠ -13
September 10, 2013

Math
The greater your depth, the longer it will take to ascend.
September 10, 2013

body systems terminology
Sensory nerves are afferent nerves. Plasma with a clotting factor removed HIV Colds are causes by viruses.
September 10, 2013

Math
(24*48)/(4*6) = ?
September 10, 2013

math
"Of what she had left" leads me to think some data is missing. If not, 16 - 16/4 = 16 - 4 = 12
September 10, 2013

math
Yes, but the specific relation depends on the specific activity related to burning the calories
September 9, 2013

math
-8º Celsius
September 9, 2013

math
We do not have access to your text or tables.
September 9, 2013

Math
https://www.google.com/search?client=safari&rls=en&q=prime+numbers+list&ie=UTF-8&oe=UTF-8
September 9, 2013

algebra
Let x = number of dimes, then x/2 for nickels and x-10 for quarters. 5x/2 + 10x + 25(x-10) = 875 Solve for x, then x/2 and x-10.
September 9, 2013

Algebra
Let first number = x, then 4x = second and x-13 = third. x + 4x + x-13 = 353
September 9, 2013

math
Assuming three meals of stew a day, number of packages = (3*3*8)/2 = ? For cost, multiply the above answer by $4.95.
September 9, 2013

math
You don't have any pieces of fruit to look for yourself?
September 9, 2013

math
Why would you want a longer way to work out the problem? What you did is fine.
September 9, 2013

Algebra
It must be less than 8 and greater than 6.
September 9, 2013

STAT
Measures of central tendency are all know generally as "averages." I. Mean is calculated as mean = ∑X/N. The mean is the fulcrum (balance point) for the distribution; therefore it is most influenced by deviant scores. II. Median is the point of the distribution...
September 9, 2013

MATH
Z score is the raw score in terms of standard deviations from the mean. The Z score cuts off the same proportion for any normal distribution. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" ...
September 9, 2013

math (?)
More data needed.
September 9, 2013

Math - Fractions
Let x = total appointments x - 1/9x - 3/16(x-1/9x) = 234 Calculate for x, then subtract 234 from x.
September 9, 2013

comm
http://drdavespsychologypage.intuitwebsites.com/Listening_Helpfully.pdf Take your pick.
September 9, 2013

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.
September 8, 2013

science
Does liking a cereal mean that it is better for you?
September 8, 2013

MATH
7 * 4/5 * 7 = ?
September 8, 2013

Psychology
The question asks for your thoughts rather than ours.
September 7, 2013

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
September 7, 2013

statistics
With "or", it is unclear whether you want the probability between the scores, above them or below them. Assuming that you want the probability between the Z scores, find table in the back of your statistics text labeled something like "areas under normal ...
September 7, 2013

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
September 7, 2013

Math - Algebra
b + 3/4b + 5/8b + 9/16b + 7/16b = 216 b + 3/4b + 5/8b + b = 216 Solve for b, then 9/16b = ?
September 7, 2013

stat
Z = (score-mean)/SD Calculate the Z score from your data above. Do you think a null hypothesis can be accepted or rejected with n = 1?
September 7, 2013

Psychology
1. Synapse is a gap, so you have to define what you mean by "meet." 2. Right. 3. Agree. 4. Is suckling acquired or inborn? 5. I'm not sure what you mean by reminder sessions. However, events need to be repeated often to be remembered. Also, in later life, there ...
September 6, 2013

COMM100
http://drdavespsychologypage.intuitwebsites.com/Communication__Gender_Bias.pdf
September 6, 2013

STATISTICS
Correlation does not necessarily indicate causation.
September 6, 2013

STATISTICS (?)
What is your question?
September 6, 2013

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 between the two Z scores.
September 6, 2013

statistics (?)
Data missing. What is your question?
September 5, 2013

math (?)
What is the tax rate and allowance for dependents?
September 5, 2013

math
$7.45*40 + 4*2*$7.45 + 12*1.5* $7.45 = ?
September 5, 2013

Math
7 + 4 = 11 66/11 = 6 6*4 = ?
September 5, 2013

Math
35,200,000 - 250,000 = ? 35,200,000 - 252,800 = ?
September 5, 2013

biology
For Juice, Ho: no difference in stacks for slime, Ho: no difference between effects of juice vs. water
September 5, 2013

math (incomplete)
It would help if you proofread your questions before you posted them. Need more data. Cost of admission? Number in group?
September 5, 2013

AP Psychology
http://drdavespsychologypage.intuitwebsites.com/Brain__General_Anatomy.pdf
September 5, 2013

math
Typically (99% of the time) Z ranges from -3 to +3. Essentially ALL of the area would be to the right (greater than) Z = -103. Do you have a typo?
September 4, 2013

LMI (?)
You need to define "them."
September 4, 2013

Math
I assume you want a little space between the top of the box and the model. If not: 1.5/8 = ?
September 3, 2013

science
14.1 * 15 = 211.5 sq m It looks like you have 4 significant figures.
September 3, 2013

science
40 mL = .040 L Does that help?
September 3, 2013

algebra (?)
What is your question? The numbers as printed do not make sense.
September 3, 2013

science
Are they both at the same temperature?
September 3, 2013

Math
Will they all need to be seated like a Greyhound Bus? If so, the number of seats.
September 3, 2013

Algebra
3P = 2C(6 +5M) 3P/2C = 6+5M (3P/2C) - 6 = 5M [(3P/2C)-6]/5 = M
September 3, 2013

Statistics
It can only be stated in probability terms. 68% = within one SD 95% = within 2 SD
September 2, 2013

stats
I'm not sure what you men by "rank-over" but here is some information about the others. http://drdavespsychologypage.intuitwebsites.com/Two___Two_____four.pdf
September 2, 2013

Spanish
Since iPod is a brand name, you can use it.
September 1, 2013

English
You're welcome.
September 1, 2013

English
disgusting, improper, degenerate, clinically psychotic?
September 1, 2013

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 related to the Z score.
September 1, 2013

algebra 2 (?)
Data missing. What are your choices?
August 30, 2013

Statistics
You are welcome.
August 30, 2013

Statistics
Right.
August 30, 2013

STATISTICS
Whichever correlation is closest to ±1 is right. That is choice D.
August 30, 2013

Statistics
First one is B. I would agree with the second too, if P<.05.
August 30, 2013

math
The one closest to a square, 20 by 20.
August 29, 2013

Math
Revise your thinking. 1. Single blind gives the control group a placebo — a substance that is inert, it has no physical effect. Subjects don't know if they are in experimental or control group to reduce placebo effect, a change in behavior solely due to believing that...
August 29, 2013

math (long div.)
Divide 6984 into 8.0000000. 6984 into 8.000 = .001 with remainder of 1016. Drop the next zero to give you 10160, divided by 6984 = 1 with remainder of 3176. Drop the next zero to give you 31760, divided by 6984 = 4 with remainder of 3824. So far the answer is .00114. Continue ...
August 29, 2013

Grammar
with = not algebra for = not trig However, "for" version is a little awkward. "I want to take algebra instead of trigonometry" would be better.
August 29, 2013

5th grade math (?)
Insufficient data.
August 28, 2013

5th grade math
2L + 2W = 88 88 factors into 2 * 2 * 2 * 11 Use that info to find your L and W, then multiply L*W = area.
August 28, 2013

Science
Since this is not my area of expertise, I searched Google under the key words "research water pollution" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=research+water+pollution&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
August 28, 2013

Statistics
1. Definitely NOT II. 2. How did they know that the students started with the "same levels of mathematical achievement"? Was Britain's National School-Leaving Exam given previously? 3. Right.
August 28, 2013

Math
Since lurking variable is essentially the same as confounding variable, I don't think it is B. Without more data, my best guess would be E.
August 28, 2013

math
1.2 meters per minute
August 28, 2013

Probability
33/211 = ?
August 28, 2013

maths
It would help if you proofread your questions before you posted them. Online "√" (v+option keys) is used to indicate square root. √(7+2(1+√3)x(1+√5) has no reference to y or z.
August 28, 2013

math
Estimate = 4 * 2000 = ? Accurate = 4 * 2150 = ?
August 28, 2013

ACT Math
I agree with you. 33-16 = 17girls 24-17 = 7 It may be a typo on the answer sheet.
August 27, 2013

maths I need answer
7+5 = 12 7 * 5 = 35 75
August 27, 2013

stat
(6+2+1)/(6+2+1+8+3) = ?
August 26, 2013

Statistics
1. correct 2. Wrong. Look up definitions of 'sample" and "Census". 3. Wrong. Look up sampling error. 4. Wrong. Look up statistic and parameter. 5. Wrong. Look up statistic and parameter. 6. Right. 7. Right. 8. Right. 9. Right. 10. Right. 11. Right. 12. Wrong...
August 26, 2013

Algebra
1. 4 - 7(8)/(-8) 4 - 56/(-8) -52/-8 = ? 2. 4-3 = 1 1^2 = 1 6(1) -3(2) = ?
August 26, 2013

Algebra
Rearranging the terms might help to see what is required. 1. 23/39-5/39 = 18/39 = 6/13 2. 2/12-7/12 = -5/12
August 26, 2013

Probablity
43/242 = ?
August 26, 2013

8th Grade Math
Anon failed to notice that t is also in the denominator. Multiply both sides by 2t. 5 - 2t^2 = 6t + 3 Combine like terms. 2 - 2t^2 -6t = 0 Multiply by -1. 2t^2 + 6t - 2 = 0 I also get no solution, but at least my equation is correct.
August 26, 2013

maths (incomplete)
Inadequate data.
August 26, 2013

statistics (incomplete)
1. You answered this in your second question. There is no data to help in making a decision.
August 25, 2013

Biology (incomplete)
Without more data, I am confused too. We need to know more about the context of the equation.
August 24, 2013

Statistics
16. 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 to the Z score. 17. Use same equation and table. 18. Use table to find P = ± ,45 to ...
August 24, 2013

Algebra
-3 1/4 = -13/4
August 24, 2013

mathematics
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.
August 24, 2013

math
mean = ∑x/n 6 = (x+y+z)/3 9 = (x+y+z+t+u+v+w)/7 63 = (x+y+z+t+u+v+w) 18 = (x+y+z) mean = (63-18)/4 = ?
August 24, 2013

math
(350-245)/30 = ?
August 23, 2013

Math 4th grade
There is no underlining. Four hundred eighty-eight, four hundred twenty-three, forty-six
August 23, 2013

Science
You cannot use just one word to describe both what it is like and what it is not like. Cell - box metabolism - burning
August 22, 2013

science
Have you heard of physics?
August 22, 2013

Biology
They are both, but MZ twins have identical genetics, you would expect their correlations to be higher. Lower correlations suggest environmental. http://drdavespsychologypage.intuitwebsites.com/Decision_Trap.pdf
August 22, 2013

Pre-algebra
Multiply both sides by 9. 7-4 = 3y You can take it from here.
August 22, 2013

Pre-algebra
Right.
August 22, 2013

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