Wednesday
September 3, 2014

# Posts by PsyDAG

Total # Posts: 18,038

Statistics
a. They are further away from the mean. b. It decreases proportionately.
December 20, 2013

Statistics
True, you hope that the effect is significant.
December 20, 2013

Statistics
I have no idea of the significance of the ones and rectangles of dots. If you want a square root symbol (√), use the (option + v) keys. The standard deviation for a sample is usually indicated with s, but the mean of a population is indicated by µ (option + m). ...
December 20, 2013

math
22(140 + .12(475) = ?
December 19, 2013

math
You are right. I forgot to include the 10 in the range.
December 19, 2013

math
14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91 and 98 are two-digit numbers that are multiples of 7. There are 89 two-digit numbers (10-99). 13/89 = ?
December 19, 2013

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.25) and its Z score. Insert Z and other data into equation below and calculate. Z = (score-mean)/SD
December 18, 2013

Pre-Algebra HELP!!!
Add 5/3 to both sides. y = 1 + 5/3 = 2 2/3 or 8/3 Do you have a typo in your equation?
December 18, 2013

Science
(20 * .5)/2 = ?
December 18, 2013

Math
2 + 2 + 5 + 7 + 3 = 19 210 + 2 = 212
December 17, 2013

Math
180, 181, 182, 183 or 184
December 17, 2013

Math (?)
No table shown.
December 17, 2013

English 11A
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 17, 2013

math (?)
More data needed. Equivalent of what?
December 17, 2013

math (?)
To find out what x equals, you need an equation, which has an equal sign (=).
December 16, 2013

Science
If "orange fish had been best camouflaged," they would be less likely be eaten.
December 16, 2013

statistics
a) Ho: mean heights = Ha: mean heights ≠ b) SEm = SD/√n c) Z = (score-mean)/SEm 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. d) Once you ...
December 16, 2013

statistics
This is probably too late, but does "etc." include the mean and standard deviation?
December 16, 2013

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 16, 2013

math
3,221/10,276 = ? * 100
December 16, 2013

I would agree definitely with A and F. Also E, if the light source did not cover the spectrum similar to sunlight.
December 16, 2013

science
We do not have your text.
December 15, 2013

statistic (??)
No table given. More data needed.
December 15, 2013

science
Compounds have different properties than their elements.
December 15, 2013

Math
P(4) = 1/12 P(5) = 1/12 Either-or probabilities are found by adding the individual probabilities.
December 15, 2013

Math
Melina gave you the total after increase. "The amount of increase" = .10 * 480 = 48
December 14, 2013

Math
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 ...
December 14, 2013

Abnormal psychology
December 14, 2013

statistics
No, unless you have more data that was not posted.
December 14, 2013

statistic
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 ...
December 14, 2013

Haven't read the original post, but he could designate that the money be left in a particular spot and send a flunky to pick it up, while he watched from a distance. He could also have the money sent electronically to an out-of-country account.
December 14, 2013

Statistics
I will start it for you. Most numbers can be obtained in more than one way. 2 and 12, the only no pay numbers, can only be obtained one way. 3 = 2,1 or 1,2 = 2 ways 4 = 2,2 or 3,1 or 1,3 = 3 ways 5 = 3,2 or 2,3 or 1,4 or 4,1 = 4 ways etc.
December 14, 2013

biology
Are you assuming no cooking of food in advance? http://news.harvard.edu/gazette/story/2009/06/invention-of-cooking-drove-evolution-of-the-human-species-new-book-argues/
December 14, 2013

Math
Rephrasing might help. 1. (18-10)/2 = ? 2. What is 2 * 6? 3. Which two animals add to 12? 4. Which animal number has a factor of 3?
December 14, 2013

Statistics
I assume this is for a distribution of means. Z = (score-mean)/SEm SEm = SD/√n Plug in data and solve for Z.
December 13, 2013

Stastics
You are welcome.
December 13, 2013

Stastics
SEm = SD/√n = 4, 2 or 1 Plug in data and solve for n.
December 13, 2013

Science
Since this is not my area of expertise, I searched Google under the key words "difference heterogenous homogeneous mixture" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=difference+heterogenous+homogeneous+mixture&ie=UTF-8&oe=UTF...
December 13, 2013

statistic (?)
December 13, 2013

Stats
Z = (score-mean)/SEm SEm = SD/√n Assuming a normal distribution, 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. Insert Z score and other data into...
December 13, 2013

science very urgent help?
Ho: RTc = RT(non-c) Ha: RTc < RT(non-c) (one-tailed) Ho: b Ha: c
December 13, 2013

Biology
The same as in any other body cell, 46. http://en.wikipedia.org/wiki/Human_genome#The_Human_Reference_Genome
December 13, 2013

Statistics
Standard deviation (SD) = square root of variance 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) related to the Z score. Insert the values into ...
December 13, 2013

Math
Why is the friend dividing by 4? To match the original, each rotation must be a minimum of 90º.
December 13, 2013

Statistics (?)
December 12, 2013

Statistics
SEm = SD/√n From this equation, you can see why it is false.
December 12, 2013

Math help,plz :(
What specific sort of info are you seeking?
December 12, 2013

Math help,plz :(
Convert all the dimensions of the room to whatever scale you are using.
December 12, 2013

Sentence Agreement Errors
subject/verb agreement error "One… were…."
December 12, 2013

Science (?)
What terms?
December 12, 2013

biology
December 12, 2013

English (?)
December 12, 2013

science
December 12, 2013

Science
I assume that you are referring to humans. Fertilization takes places when a sperm enters the ovum. If there is no fertilization, there is no zygote and no baby.
December 12, 2013

Science (?)
None listed.
December 12, 2013

Statistics
Using P ≤ .05, if the probability the results would occur by chance is P > .05, you would accept the null hypothesis. By using any level of significance, if it equals or is less than that level, you would be assuming that the results indicate significant differences. ...
December 12, 2013

Statistics
The sample size reduces variability of distribution of means as it gets larger, but does not effect the expected value for the sample mean.
December 11, 2013

Science
Since this is not my area of expertise, I searched Google under the key words "meiosis and genetic variability" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=meiosis+and+genetic+variability&ie=UTF-8&oe=UTF-8 In the future, you ...
December 11, 2013

Math (?)
More data needed.
December 11, 2013

science
Since this is not my area of expertise, I searched Google under the key words "How does x ray radiation affect seed germination? " to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=How+does+x+ray+radiation+affect+seed+germination%3F...
December 11, 2013

science help plzzzzzzzzzzzzzzz?
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 previous post.
December 11, 2013

math
\$90 + \$35(5) = ?
December 11, 2013

Math
Since all months have teens with 1s and twenties with 2s, they would be the most often. 0 occurs three times. How about the other numbers? Watch out for February.
December 10, 2013

Logrythmic Math needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
December 10, 2013

Science
Sounds good.
December 10, 2013

Science
When significant contradictory evidence is found.
December 10, 2013

math
\$20 + .25m > \$37 Solve for m.
December 10, 2013

Science need help
5 or if the experiment is replicated, 2 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.
December 10, 2013

statistics
Victor or Junior, did you multiply my response to find the answer?
December 9, 2013

statistics
You have a lot of unnecessary data given to answer your question. .25 * 135 = ?
December 9, 2013

Geometry
A cube would have the least surface area. How well would a cube fit on our shelves?
December 9, 2013

Psychology
Albert Ellis’ ABC Theory A. Activating Experiences — usually some frustration B. Beliefs — what we think about the activating experiences, which mediates the experiences to determine the consequences. Problems are likely to be exaggerated if we 1. Ignore the ...
December 9, 2013

STATS2
B http://en.wikipedia.org/wiki/Policy_analysis
December 9, 2013

math (?)
What are the statements?
December 9, 2013

STATS
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 9, 2013

algebra (?)
All what?
December 9, 2013

Religion needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
December 9, 2013

statistics
Arranged in order of value as you have them, with 20 scores, between the 17th and 18th scores would be the 90th percentile (defining the top 10%). Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the ...
December 8, 2013

math
It would not make any difference how they arranged them in terms of age. Each swimmer would still have to swim 100m.
December 8, 2013

Psychological Statistics
What research situations have you chosen? IQ compared to GPA? (r = ?) IQ compared to letter grade in a particular course? (X^2 = ?) I'll leave the rationals up to you.
December 8, 2013

science gr.8
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.
December 8, 2013

Statistics
1.00 - .49 - .25 = ?
December 8, 2013

science
Since this is not my area of expertise, I searched Google under the key words "compare and contrast uplift and subsidence" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=compare+and+contrast+uplift+and+subsidence&ie=UTF-8&oe=UTF-8...
December 8, 2013

Statistics
Z = (score-mean)/SD You need the values of the mean and standard deviation. Unless you are dealing with a distribution of means, n does not matter.
December 8, 2013

math (?)
Each swimmer is supposed to swim 100m in one stroke. Given "4 by 100," is one swimmer going to swim two laps? Where is the fourth swimmer? What method are you using to break "up the distance of 400 meters by age"? The youngest gets to swim 200 meters? Each ...
December 8, 2013

Math
I didn't see any answers. Please only post once. Repeating posts or asking for help in another post 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 8, 2013

Math
100 + 5 Equilateral means equal sides.
December 8, 2013

Buisness Math (?)
No matrices posted.
December 8, 2013

BIOLOGY
December 7, 2013

BIOLOGY
Since this is not my area of expertise, I searched Google under the key words "plant animal differences" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=plant+animal+differences&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
December 7, 2013

BIOLOGY (?)
What problem are you considering?
December 7, 2013

BIOLOGY (?)
What hypothesis are you considering?
December 7, 2013

BIOLOGY
A control group is used to see if the same results would occur without the independent variable. 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 ...
December 7, 2013

BIOLOGY
To start, see if it is plugged in the wall socket. Since this is not my area of expertise, I searched Google under the key words "repair electric fan troubleshoot" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=repair+electric+fan...
December 7, 2013

Statistics
Although you indicate n = 17, you only have 16 scores listed. 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...
December 7, 2013

Math
From the way you have defined the problem, you cannot satisfy both criteria in one spin, unless they indicate the same number. 2, 4, 6, and 8 are multiples of 2. 4 = 2 * 2, so 2 is a factor of 4. 2 is one of the 8 alternatives = 1/8
December 7, 2013

SAT MATH
Every other number is odd, so 3000/2 = ?
December 7, 2013

STATISTICS
What you want is the probability of getting 1, 2 or 3 hermaphrodite plants. However, what is the total number of plants? If there are only three, then the answer = 1 (certainty). If the events are independent, the probability of both/all events occurring is determined by ...
December 7, 2013

Healthcare Statistic
Ho: errors in shift one = errors in shift two Use principle indicated above to give second Ho.
December 7, 2013

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