Saturday
August 30, 2014

Posts by PsyDAG


Total # Posts: 18,027

Intermediate FT
Multiply equation by x. 3 + 4 + 2x = 2x Equation has no solution.
December 6, 2013

Statistics
From your limited data, there is no variability measure for t-test. I wouldn't even know how to figure the mean. You might want to use chi-square test for whatever you are hypothesizing. To use the Chi-square (X^2) method: X^2 = ∑ (O-E)^2/E, where O = observed ...
December 6, 2013

math
Do you have a calendar? Count the days.
December 6, 2013

Science
Since this is not my area of expertise, I searched Google under the key words "nutrient definition" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=nutrient+definition&ie=UTF-8&oe=UTF-8 In the future, you can find the information ...
December 6, 2013

math?
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. With three unknowns, you need more data.
December 6, 2013

Statistics
This is a little clearer. The larger portion (body) for positive Z scores is to the left. For negative Z scores, it is to the right. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/...
December 6, 2013

Statistics
We cannot draw on these posts. The Z score is your score in terms of standard deviations from the mean. There would be a tail on both sides. Are you looking for the smaller portion? https://www.google.com/search?client=safari&rls=en&q=normal+distribution+standard+deviation&ie=...
December 6, 2013

math (?)
No problem at the bottom.
December 5, 2013

Biology
It used to be phenotypes, but if genomes are available, it could be either.
December 5, 2013

psychology
Since typically children do not have as many resources to deal with these conditions, I would assume their conditions are likely to be more severe and long-lasting.
December 5, 2013

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] = Z = 1.96. You divide by 2, because you are considering both above and below. 95% = mean ± 1.96 SEm The ...
December 5, 2013

Science need help
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. 5 and 6.
December 5, 2013

Statistics
Next time, give your response, so we can evaluate it. True
December 5, 2013

Statistics
True
December 5, 2013

Statistics
True
December 5, 2013

Biology
I'm not sure exactly what you are asking. In psychology, positive control (or at least an attempt at it) involves incentives and rewards. Negative aspects involve punishment or lack/removal of reward. If this is what you are seeking, you should be able to think of examples.
December 4, 2013

Algebra
You got them all correct.
December 4, 2013

Math
Multiply first equation by 2. Assuming that y was accidentally eliminated in the second equation. 4x - 10y = 6 -4x + 10y = -6 Adding the two together: 0 = 0. One equation is just the negative of the other. In other words, if you multiply one equation by -1, you get the other.
December 4, 2013

Statistics (?)
What is your question?
December 3, 2013

Science (?)
What type of wave?
December 3, 2013

math
4/5 + 4/5 = ?
December 3, 2013

math
3/5 * 10 = ?
December 3, 2013

math
1/2 * 1/3 = ?
December 3, 2013

math
3 * 4 = ?
December 3, 2013

statistics (?)
What is your question? If you want to know Kelsey's score: Z = (score-mean)/SD -1.85 = (score-72)/4
December 3, 2013

statistics
(100*10)/(7*60) = ?
December 3, 2013

science
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.
December 2, 2013

Algebra!
(1) Let x = standard shipments and y = express. y = 108 - x 3.5x + 7.5y = 506 Substitute 108-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. (2) Use similar process ...
December 2, 2013

science
I assume you only need to determine the sex chromosomes. The daughter has XX sex chromosomes. Since she has hemophilia, a recessive gene on the X chromosome, she must have inherited the hemophilia from both parents. However, since the son also receives an X chromosome from mom...
December 2, 2013

Statistic
See your previous post.
December 2, 2013

Statistic
62,400/(100*#workdays in a year) = ?
December 2, 2013

Statistics
You might want to round it to the nearest person. It rounds to 17, but if you want all the records to be covered, you might round it up to 18. This would give the FTEs a little slack.
December 2, 2013

Statistics
8600/(100*5) = ?
December 2, 2013

biology
The girls all receive normal X chromosome from dad, meaning they cannot be more than carriers. If males get recessive gene, they will have hemophilia since there is no dominant gene on the Y chromosome to supress the hemophilia gene. How do you get six variations? XCXC, XcY ...
December 2, 2013

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Assuming the comma has the same meaning as a period in the USA: 2.3 * -5 = -11.5
December 1, 2013

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 13/52 * 12/51 * 11/50 * 10/49 * (13*3)/48 = ?
December 1, 2013

Statistics 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. A
December 1, 2013

Math
1600 + 17600*.081 + (29700-17600)*.09 = ?
December 1, 2013

algebra 1
With answer from B, Mean(for median) = (B + ?)/2 = 227
December 1, 2013

algebra 1
A. mean = ∑x/n = (225+245+222+230+x)/5 = 221 Solve for x. B. Arrange 5 score in order of value. Middle score is the median. C. With even number of scores, mean of the two middle scores = median
December 1, 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.
December 1, 2013

Math.stat help :(
Ho: mean1 = mean2 Ha: mean1 ≠ mean2 Since these are just samples rather than the whole population, µ is an inappropriate designation. µ is parameter rather than a statistic. Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(...
November 30, 2013

statistics
It is the Z test (google it). Where is your confusion centered?
November 30, 2013

statistics
Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n (n = # of trips) If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled ...
November 30, 2013

Health (Ms. Sue)
1. They could view genetics as a boon or threat, which would influence their dealings greatly. What would do if you thought something was a boon… or a threat? 2. I would need to know first what the news reports actually say.
November 29, 2013

Child development
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. I would say B.
November 29, 2013

math
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 "...
November 29, 2013

biology
https://www.google.com/search?client=safari&rls=en&q=DNA+RNA+polymerases+similarities&ie=UTF-8&oe=UTF-8
November 29, 2013

biology
Since this is not my area of expertise, I searched Google under the key words " bacterial vs. mammalian transcription" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=bacterial+vs.+mammalian+transcription&ie=UTF-8&oe=UTF-8 In the ...
November 28, 2013

science
Clouds of what? http://scienceline.ucsb.edu/getkey.php?key=884
November 27, 2013

science
The sun does not have an atmosphere or crust.
November 27, 2013

maths
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. However, the sign is not needed, if a parenthesis is present. 2y(-28)=48 -56y = 48 y = 48/-56 Reduce.
November 26, 2013

statistics
A parameter is data about the whole population, while a statistic deals with a part of the population, a sample. What does that tell you?
November 26, 2013

Biology
It's possible, but what type of genes are going to be inserted? Who will determine who will get what genes? As with medicine, will there be unintended side effects? That should give you a start.
November 26, 2013

communicate
This is asking for your response to an unknown artifact. Our psychic abilities are limited or nonexistent.
November 25, 2013

statistics psy/315
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 "...
November 25, 2013

math (?)
No information above. Original price of chair missing.
November 25, 2013

math (?)
Data missing. A parameter is a measure on the total population, while a statistic is a measure on a portion of the population.
November 24, 2013

statistics
A normal distribution approximates a bell-shaped curve. Outliers to one side would skew the distribution. If the distribution was flat, having about the same frequencies throughout the distribution, this would be non-normal. Also a bimodal distribution would be non-normal, ...
November 24, 2013

Statistics
% = mean ± Z(SEm) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (%/2) from the mean and its Z score. Substitute values into above equation and calculate. If you ...
November 24, 2013

statistics
right.
November 24, 2013

math (?)
What is your question?
November 24, 2013

pre-algebra (?)
What model?
November 24, 2013

science
Since this is not my area of expertise, I searched Google under the key words "Lamarck vs. Darwin differences" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=lamarck+vs+darwin+differences&ie=UTF-8&oe=UTF-8 In the future, you can ...
November 24, 2013

statistics (?)
What following? 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. This may help you decide.
November 24, 2013

Math
I am assuming the Eric is ON the train. 24/3 = 8 ft./sec. 8 + 80 = ?
November 23, 2013

Science
I would assume so. 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.
November 23, 2013

algebra 2
Except for multiplying/dividing by a negative number, treat just like an equation. First get rid of the parentheses by multiplying. 2x - 10 > 6x -18 Subtract 2x from both sides and add 18 to both sides. You should be able to work it from there.
November 23, 2013

medical needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
November 22, 2013

statistics
Cannot sketch on these posts. 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.
November 22, 2013

science
What type of mutations are you referring to? Dominant? Recessive? Other?
November 22, 2013

science
1. B 2. B
November 22, 2013

statistics (?)
Where is your data?
November 21, 2013

math (?)
Powers not shown.
November 21, 2013

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 "...
November 21, 2013

Statistics
Right
November 21, 2013

College Algebra (?)
What line? Graphics cannot be posted.
November 21, 2013

stastistics
Null hypotheses propose no effect.
November 21, 2013

College Algebra
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.
November 21, 2013

Science
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. I answered this before. Carriers have the recessive gene in their genotype, ...
November 21, 2013

Statistics
% = 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 ([1-%]/2) to find the Z score. Insert that into ? position. Example: 95% = 74.8 &...
November 21, 2013

Statistics
% = mean ± ? SEm Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-%]/2) and its Z score. Enter Z score for ?. Solve for intervals.
November 21, 2013

Statistics
A null hypothesis expects no difference.
November 21, 2013

Algebra 1
72 + 4(12-6) = ?
November 20, 2013

biology
Since this is not my area of expertise, I searched Google under the key words "atom structure picture" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=atom+structure+picture&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
November 20, 2013

math(check answers please)
1. B 2. A 3. 3f + 2f = 5f
November 20, 2013

Math
1, 2. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3. 8 lots total. With each selection, there is one less large lot and one less total. 6/8 * 5/7 * 4/6 = ? 4. 6/15 * 5/14 = ?
November 20, 2013

Psy/355
I searched Google under the key words "motivation" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=motivation&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more quickly, if you use appropriate key words ...
November 20, 2013

Statistics
The smallest is most significant.
November 20, 2013

physical (?)
What statements?
November 20, 2013

Math/Science
(58.7 * 10^16)/(9.3 * 10^4) = ? seconds To convert to hours, multiply by 360. For days, multiply again by 24. For years, multiply again by 365. for centuries, multiply again by 100.
November 19, 2013

science
Not sure what this statement means. The light from the sun gets stronger at sunrise and weaker at sunset, but the radiation from the sun is about the same under both conditions.
November 19, 2013

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.
November 19, 2013

Statistics
Ho: Smpking does not effect the period of gestation. Generalize from the above to other null hypotheses.
November 19, 2013

math (?)
What are your choices?
November 18, 2013

Science
To carry the disease means that it is in the genotype but not the phenotype. That would happen with a recessive gene. It will occur.
November 18, 2013

Math (?)
We cannot view graphs on these posts.
November 18, 2013

Math
Please, where is the specific question?
November 18, 2013

math
5 + 4.75 + 2.25 = ? Convert to feet and inches.
November 18, 2013

algebra
Subtract 3x from both sides, then divide both sides by 6.
November 18, 2013

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