Wednesday
December 17, 2014

Posts by PsyDAG


Total # Posts: 18,849

statistics
Ho: µ Pop = µ sample Ha: µ Pop < µ sample 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 ...
May 4, 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.
May 4, 2014

Math (check)
Yes
May 4, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "ethical issues behind cloning" to get these possible sources: http://search.aol.com/aol/search?query=ethical+issues+behind+cloning&s_it=client-addressbarmac-unauth In the future, you can ...
May 4, 2014

Statistics
Statistical?
May 4, 2014

algebra (?)
What is your question?
May 4, 2014

algebra
(7√π)/(√π) = 7
May 4, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "Forces affecting falling objects" to get these possible sources: http://search.aol.com/aol/search?query=Forces+affecting+falling+objects&s_it=client-addressbarmac-unauth In the future, you...
May 4, 2014

Statistics
95% = mean ± 1.96 SEm SEm = SD/√n Where does 4 cm fit in this distribution?
May 4, 2014

applied statistics
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable. A dependent variable is the response or measure of results. Would you say that mother's age might cause number ...
May 4, 2014

math
295 + .15(k-1000) < 389 Solve for k.
May 3, 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 "...
May 3, 2014

Math
Q = 2.5D 10D + 25Q = 225 Substitute 2.5D for Q in second equation and solve for D. Insert that value into the first equation and solve for Q. Check by inserting both values into the second equation.
May 3, 2014

statistics
4. C 5. B
May 3, 2014

statistics
B. However, there is no data given that indicates which diet lost more pounds.
May 2, 2014

Science
Essentially all species have dominant and recessive traits. Once you know the genotypes of the parents, you can use a Punnett square to determine the frequencies in the offspring.
May 2, 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 your later post.
May 2, 2014

math 1 question pls help!!!
(138-129)/138 = ?
May 2, 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.
May 2, 2014

algebra (?)
It would help if you proofread your questions before you posted them. What is the power of x?
May 2, 2014

maths
3.14 = π. Are you sure that value is for the radius? SA = πrs + πr^2
May 2, 2014

Math
(x^3-2x-4)/(x-2)
May 2, 2014

statistics
Were the subjects expressing liking of both animals the same or different? Need to know total number of subjects.
May 2, 2014

Statistics
Gets smaller
May 2, 2014

math
No figure shown. Online "^" is used to indicate and exponent, e.g., x^2 = x squared. It would help if you proofread your questions before you posted them. You omitted π. V = 4/3πr^3 = 4/3 * 3.14 * 4.5 * 4.5 *4.5 = ?
May 2, 2014

math (?)
What formula?
May 2, 2014

Math 2
3/5
May 2, 2014

Algebra
(1/3)/4 = ?
May 2, 2014

Science
No, what if the water is calm?
May 2, 2014

Math
Only 8/8 and 2/2 can be written as 1.
May 1, 2014

statistics
two-sample t-test
May 1, 2014

Space Exploration
Can you divide into capital and maintenance costs?
May 1, 2014

math
Since this is not my area of expertise, I searched Google under the key words "how much lottery revenue has been allocated to education in North Carolina" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=how+much+lottery+revenue+has...
May 1, 2014

math (?)
What are your choices? You cannot copy and paste here.
May 1, 2014

Math
It doesn't look like you did a problem. 2x - 28 + 3 = 7x + 5 -30 = 5x -6 = x
May 1, 2014

Statistics
.05 * 300 = 15 This means you would expect 15 tests to be significant solely by chance.
May 1, 2014

Statistics
With your limited data, I would pick C, because the confidence level includes zero.
May 1, 2014

science
Since this is not my area of expertise, I searched Google under the key words "restriction enzymes genetic engineering" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=restriction+enzymes+genetic+engineering&ie=UTF-8&oe=UTF-8 In ...
May 1, 2014

Algebra
https://www.google.com/search?client=safari&rls=en&q=math+ac+method&ie=UTF-8&oe=UTF-8
April 30, 2014

biology
Since this is not my area of expertise, I searched Google under the key words "ways that DNA mutation can alter genetic material" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=ways+that+DNA+mutation+can+alter+genetic+material&ie=...
April 30, 2014

algebra
Z = (score-mean)/SD Insert values and solve for SD.
April 30, 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 your later post.
April 30, 2014

Probability
One parent is Bb and the other is bb. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8
April 30, 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.
April 30, 2014

Probabitilty
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.
April 30, 2014

science
Since this is not my area of expertise, I searched Google under the key words "ocean area with few living things" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=ocean+area+with+few+living+things&ie=UTF-8&oe=UTF-8 In the future, ...
April 30, 2014

Algebra 2
Online "^" is used to indicate and exponent, e.g., x^2 = x squared. 5^4 = 5 * 5 * 5 * 5 = 625
April 30, 2014

math (?)
What is your question?
April 30, 2014

math
$154,330 * .045 = $6944.85
April 30, 2014

statistics (?)
What is your question?
April 30, 2014

statistics
A. Pairs were not matched. Sample too small for Z test. Group differences not measured by correlation.
April 30, 2014

Math
220 * 2 * $.75 = ?
April 30, 2014

Math
22,000/400 = ?
April 30, 2014

math
35 * 20 * 5 * 7 = ?
April 30, 2014

statistics
Inadequate data. 95% = mean ± 1.96 SEm SEm = SD/√n
April 30, 2014

Math
a. No, players of other sports not represented. b. Yes, it is open-ended.
April 29, 2014

Statistics
https://www.google.com/search?client=safari&rls=en&q=Tukey's+HSD+test&ie=UTF-8&oe=UTF-8
April 29, 2014

statistics
8. A 9. B
April 29, 2014

science
To keep the next generation from having double the species number of chromosomes.
April 29, 2014

algebra 1
x - 315/21 = 9 Solve for x.
April 29, 2014

Math
Assuming a normal distribution: 95% A = 1.2 ± 2 * .1 95% B = 1.5 ± 2 * .9
April 29, 2014

math
Cannot post graph here. Pick various values of x and calculate corresponding values of y. Draw your graph.
April 29, 2014

Psychology
Understanding the world around us. Does that correspond to any of your choices?
April 29, 2014

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

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