Friday
August 22, 2014

Posts by PsyDAG


Total # Posts: 17,987

math
Multiply both sides by P and divide both sides by 300 to solve for J.
April 29, 2014

Statistic in Social Science
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(.90, .15, etc.) and related Z score. Insert into above equation and solve for score. For last two (c & d) ...
April 29, 2014

statistics
Without more data, I would also pick C.
April 28, 2014

Math
√-1 = i https://www.google.com/search?client=safari&rls=en&q=square+root+of+negative+one&ie=UTF-8&oe=UTF-8
April 28, 2014

Math
First of all, range is not a measure of central tendency. Since hours are numerical, eliminate C. However, since the data is not given, we cannot know if there are a significant number of outliers on one side (skewed distribution) or not. If so, median. If not, mean. The mean ...
April 28, 2014

Science. Check Answer
I assume you are referring to the physics definition of work. 1. W 2. W 3. N 4. W 5. W 6. N 7. W 8. W 9. W 10. N In physics, a force is said to do work when it acts on a body, and there is a displacement of the point of application in the direction of the force. For example, ...
April 28, 2014

math
a. Matched pairs c. 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 = number of cells Look up value in X^2 table in...
April 28, 2014

Biology
Since this is not my area of expertise, I searched Google under the key words "functions of the skin" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=functions+of+the+skin&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
April 28, 2014

math question
From your data, 63% + 9% = ?
April 28, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "contribution of African elephant to world" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=contribution+of+African+elephant+to+world&ie=UTF-8&oe=UTF-8 ...
April 27, 2014

Statistics
Use data from your previous post. 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 your Z score.
April 27, 2014

Statistics (?)
Lacking data. https://www.google.com/search?client=safari&rls=en&q=cats+sleep+time&ie=UTF-8&oe=UTF-8
April 27, 2014

Probability
How does she know that she wasn't picking the same marble each time?
April 27, 2014

Sociology
A little additional information: http://drdavespsychologypage.homestead.com/Person_Perception__East_vs__West.pdf
April 27, 2014

Sociology
Assuming that you comparing Oriental (Easterners) vs. Occidentals (Westerners), Agree
April 27, 2014

Sociology
Disagree
April 27, 2014

Biology
The female has to be GG, and the male has to be bb. (Cannot be Gb.) The above are the genotypes. Use a Punnett Square to calculate offspring. https://www.google.com/search?client=safari&rls=en&q=Punnett+square&ie=UTF-8&oe=UTF-8
April 27, 2014

math
If x = shorter piece, then 4x = longer. x + 4x = 35 Solve for x.
April 27, 2014

Psychology
To find out if the test measures what it is supposed to measure (validity), test results are compared to some criterion.
April 27, 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 (.025) related to the Z score.
April 27, 2014

Math needs Help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
April 27, 2014

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-.95]/2 = .05/2 = .025) and its Z score. A. 95% = mean ± 1.96 SEm SEm = SD/√n
April 27, 2014

science (?)
How do you define "food miles" and "food points"?
April 27, 2014

ap statistics
Same as previous post.
April 26, 2014

ap statistics
Ho: mean1 = mean2 Ha: mean1 > mean2
April 26, 2014

Math
Circumference = 2πr = 2 * 3.14 * 8 = ?
April 26, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "limitations for modeling mitosis" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=limitations+for+modeling+mitosis&ie=UTF-8&oe=UTF-8 In the future, you ...
April 26, 2014

science
Since the consumers eat the producers, I think more producers would lead to more energy available to the consumers.
April 26, 2014

ap 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 your later post.
April 25, 2014

ap 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.
April 25, 2014

health sciences
Since this is not my area of expertise, I searched Google under the key words "changes that occur in the DNA of muscle fibers during exercise" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=changes+that+occur+in+the+DNA+of+muscle+...
April 25, 2014

science
acceleration?
April 25, 2014

Math
Right!
April 25, 2014

ap statistics
If you have multiple samples, their means will have a distribution. The mean and SD for that distribution answers your question.
April 25, 2014

Biostatistics (?)
If the data is missing, how can you put it in?
April 25, 2014

Science (?)
None listed. You cannot copy and paste here.
April 25, 2014

Statistics
https://www.google.com/search?client=safari&rls=en&q=pearson+correlation+calculator&ie=UTF-8&oe=UTF-8
April 24, 2014

math
R/2 = G G + R + 8 quarts = R/2 + R + 2 gallons = 14 gallons Solve for R.
April 24, 2014

statistics (?)
What is (are) your question(s)?
April 24, 2014

Math
https://www.google.com/search?client=safari&rls=en&q=Statistical+trees+branches&ie=UTF-8&oe=UTF-8
April 24, 2014

science
Consumer?
April 24, 2014

math
4 times as many as 8 = 8 * 4 = 32 1/4 as many as 8 = 1/4 * 8 = 8/4 = 2 Cannot draw on these posts.
April 24, 2014

SCIENCE (incomplete)
No chart. Cannot copy and paste here.
April 24, 2014

biology
Since this is not my area of expertise, I searched Google under the key words "cell translation" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=cell+translation&ie=UTF-8&oe=UTF-8 In the future, you can find the information you ...
April 24, 2014

Health
Lack of professionals to access, cost of accessing, lack of trust of professionals, not believing they need help
April 24, 2014

Math
Read my answer again. m = math time.
April 24, 2014

Math
Let m = math time, then English = 3m and science = 2m. m + 3m + 2m = 120 minutes Solve for m, then 2m.
April 24, 2014

science
How about feathers, wings and beaks? https://www.google.com/search?client=safari&rls=en&q=bird+characteristics&ie=UTF-8&oe=UTF-8
April 24, 2014

math (?)
Same thing here.
April 23, 2014

math (?)
"jpg" indicates you are copy and pasting. Can't do it here.
April 23, 2014

Science
https://www.google.com/search?client=safari&rls=en&q=Dilithium&ie=UTF-8&oe=UTF-8 What conclusion do you come to?
April 23, 2014

Biology help
We know that certain genes have specific effects on one's phenotype. However, Outside of containing DNA, we do not know how they cause these effects. https://www.google.com/search?client=safari&rls=en&q=How+does+a+gene+determine+a+trait%3F&ie=UTF-8&oe=UTF-8
April 23, 2014

math
It would help if you proofread your questions before you posted them. Millimeters is a length unit rather than volume. Even if this was changed to milliliters, the question is still unclear.
April 23, 2014

Science
Merely by writing these sentences will help you to remember the material you have written. Information in the following articles might also help. http://drdavespsychologypage.homestead.com/Be_Here_Now_.pdf http://drdavespsychologypage.homestead.com/Learning_Requirements.pdf ...
April 23, 2014

maths
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 less than .05?
April 23, 2014

Statistics and probability
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 = number of cells Look up value in X^2 table in the back of your ...
April 23, 2014

Algebra II
Anything times 1 or to the first power is itself. Unless you have typos, here is what I get: (2x)^3 + 12x^2 * (-5y) + 6x * 25y^2 - 125y^3 = 8x^3 - 60x^2y + 150xy^2 - 125y^3
April 23, 2014

Algebra II
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (12/15)^7 * (3/15)^3 = ?
April 23, 2014

math
I assume it is a right triangle. Area = 48 = 1/2 hb 96 = hb Set one variable as multiple of 2 and see if the same multiple of 3 will multiply to = 96. Pythagorean theorem: 8^2 + 12^2 = Hyp^2 64 + 144 = 208 = Hyp^2 √208 does not match any of your choices. 14 < √...
April 23, 2014

Stats.
What about the women that tested negative for cancer?
April 23, 2014

statistics (?)
No table. You cannot copy and paste here.
April 23, 2014

math
If c = "additional number off (sic) customers," then each teller will serve "c - 16 OVER 4" [more clearly written (c-16)/4] additional customers.
April 22, 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. See your later post.
April 22, 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. Quit using different names.
April 22, 2014

health
Since this is not my area of expertise, I searched Google under the key words "cardiac smooth muscle" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=cardiac+smooth+muscle&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
April 22, 2014

Science
https://www.google.com/search?client=safari&rls=en&q=increase+the+magnetic+field+around+a+wire%3F&ie=UTF-8&oe=UTF-8
April 22, 2014

genetics
1. Mate with an Ll. If about 25% offspring are short-winged, it is also Ll. If none, it is LL. 2. If dominant, only one gene is needed for the disorder. If mom is heterozygous, her chances are 50%, if homozygous, certainty. 3. Right. If both parents are only carriers for the ...
April 22, 2014

Algebra
60 - 60/3 - 60/4 = ?
April 22, 2014

Probability (?)
Five defects out of how many? What size sample?
April 22, 2014

statistics
95% = mean ± 1.96 SEm SEm = SD/√n 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 = ...
April 21, 2014

Math
If the scale does not continue to slide, 20 * 10 = ?
April 21, 2014

Math
L > 3s + 4
April 21, 2014

math
x/17.5 = 12/5 Solve for x.
April 21, 2014

math
Convert feet to inches, then divide. (11*12*14*12)/(4*4) = ?
April 21, 2014

statistics (?)
Lacking data.
April 21, 2014

geology
Since this is not my area of expertise, I searched Google under the key words "value of igneous rocks" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=value+of+igneous+rocks&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
April 21, 2014

math (?)
What is your question?
April 21, 2014

Evolution question - HELP!
Since this is not my area of expertise, I searched Google under the key words "Niles Eldredge change" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Niles+Eldredge+change&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
April 21, 2014

Biology
If you are talking about the undigested food, it is chyme. If you mean the valve, it is the pyloric valve. You could have checked your answer more quickly by Googling it.
April 21, 2014

Psychological and Psychophysiological Stress Disor
I don't know if they are all undiagnosable, but war, rape, earthquake, tornado, explosions, severe physical attack, kidnapping….
April 20, 2014

Ollu
How close will you be standing to the mirror?
April 20, 2014

statistics
Why are two of the scores 35? Typo? Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the percentiles related to the Z scores. T = 50 + 10Z
April 20, 2014

statistics
We cannot show frequency distribution here. Arrange score in order of value. The frequency of each score will determine its value on the ordinate (y-axis).
April 20, 2014

statistics
Since this is not my area of expertise, I searched Google under the key words "contribution of computer in the development of science and technology" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=contribution+of+computer+in+the+...
April 20, 2014

Math
What do the widget manufacturers want to know? Production levels of widgets? Standardization of widgets? Sales of widgets?
April 19, 2014

math
From the way you have your last equation written "square root 3 /2" Looks like √(3/2). It should be written (25√3)/2. The brackets make the meaning clearer. The square root sign (√) can be obtained by using "v" and "alt/option" ...
April 19, 2014

math
Use Pythagorean theorem to find other leg. h^2 + b^2 = Hypotenuse^2 h^2 + (5√3)^2 = 100 Solve for h. Area = 1/2 hb Insert values and solve for area.
April 19, 2014

math
-4x-4y=12 Mutliply by 4. -16x - 16y = 48 Second equation: 16y=-16x-48 Transpose. 16x + 16y = -48 Multiply by -1. -16x - 16y = 48 What does that tell you?
April 19, 2014

maths
x = included, y = bring own y = 30 - x 5x + 3y = 110 Substitute 30-x for y in second equation and solve for x. Insert that value into the first equation and solve for y. Check by inserting both values into the second equation.
April 19, 2014

Math
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.
April 19, 2014

statistics
Ho: µ = sample mean
April 18, 2014

statistics
Z = (score-mean)/SD Insert the known values and solve for the unknown.
April 18, 2014

Psychology
interaction?
April 18, 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 related to the Z score.
April 18, 2014

sociology
I would tend to go with "not falsifiable." This theory is NOT "based on empiricism," since "she is unable to produce an individual with above chance predictions."
April 18, 2014

Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.05) = Z = 1.645 90% = mean ± 1.645 SEm SEm = SD/√n
April 18, 2014

Science
In the chromosomes of the egg and sperm.
April 18, 2014

Algebra
Divide both numerator and denominator by 2.
April 18, 2014

Algebra
8/2a
April 18, 2014

Stats
95% = mean ± 1.96 SEm SEm = SD/√n
April 18, 2014

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