Monday
October 20, 2014

Posts by PsyDAG


Total # Posts: 18,474

statistics
Right, this is descriptive statistics, not inferential. http://sociology.about.com/od/Statistics/a/Descriptive-inferential-statistics.htm
January 7, 2014

maths
4 * 3 = 12 27 * 16 = 432 Divide both numerator and denominator by 12.
January 7, 2014

science... PLEASE HELP!
Since this is not my area of expertise, I searched Google under the key words "Archaebacteria" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Archaebacteria&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire ...
January 6, 2014

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 scores. Or you can go to http://davidmlane.com/hyperstat/z_table.html
January 6, 2014

statistics
Assuming that your square is a negative sign, it would be true.
January 6, 2014

math
I can't decipher your diagram. If the rectangle is 8 by 20, the perimeter = 2(8) + 2(20) = ?
January 5, 2014

science
Since this was not my area of expertise, I hesitated to answer. Are you assuming that they are both rotating in the same direction? However, my assumption is that, since the sizes of the planets are different, the same side would NOT always be seen from the earth.
January 5, 2014

Health (Ms. Sue)
Although I am not Ms.Sue, good answers, but get rid of the question marks at the end of your answers. "…which consist of body parts…."
January 4, 2014

Biology
Although this is not my area of expertise, I assume it is because our metabolism slows down.
January 4, 2014

Math
If you post specific problems, if is very likely.
January 3, 2014

statistics
Agree, ± 68% of the time.
January 3, 2014

statistics
True, ±3 SD < range.
January 3, 2014

math
An inequality is treated just like an equation, except that multiplying/dividing by a negative value reverses the carat (< to >). Post your answers, and we will be happy to respond to them.
January 3, 2014

college algebra
We can't do it on these posts.
January 2, 2014

college algebra (?)
We cannot see the figures on these posts.
January 2, 2014

Maths
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. A. .3 * .4 = ? B. .7 * .3 = ?
January 2, 2014

psychology
Please do not use all caps. Not only is it harder to read, but it is like SHOUTING online. Thank you. Also, it would help if you proofread your questions before you posted them.
January 2, 2014

statistics
True
January 1, 2014

Health (Ms. Sue)
Additional Information. http://drdavespsychologypage.homestead.com/AIDS___Teenagers.pdf
January 1, 2014

science
http://en.wikipedia.org/wiki/Amnesia
January 1, 2014

statistics
Plus or minus a standard error of the mean (SEm) encompasses approximately 68% of the probable scores. SEm = SD/√n
December 31, 2013

statistics
When you find the sum of the squares, divide that by the number of scores to get variance.
December 31, 2013

statistics
Don't agree.
December 29, 2013

statistics
The critical region CR, or rejection region RR, is a set of values of the test statistic for which the null hypothesis is rejected in a hypothesis test. That is, the sample space for the test statistic is partitioned into two regions; one region (the critical region) will lead...
December 29, 2013

Science
Yes, that is the only behavior listed.
December 27, 2013

Science
Agree.
December 27, 2013

Statistics
Without further data, I would say mode. Eye color would only be a nominal scale. http://drdavespsychologypage.homestead.com/Two___Two_____four.pdf
December 25, 2013

Psy.
C http://drdavespsychologypage.homestead.com/Good_Vs__Evil.pdf
December 24, 2013

math
http://www.youtube.com/watch?v=wRttEDsPQ-g
December 23, 2013

biology
Notice that my address is "Psy," which stands for psychology. Since this is not my area of expertise, I searched Google under the key words "carbon cycle" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=carbon+cycle&ie=...
December 23, 2013

language art(1 question)
I disagree.
December 23, 2013

biology
"speed of solving math problems" = "how fast math problems can be solved" Why is "OR" in caps? 5. "...See if the experimental group solved math problems significantly more rapidly than the control group." There may be a difference, but ...
December 23, 2013

Psychology
http://drdavespsychologypage.homestead.com/Reinforcement__Controlling_Behavior.pdf http://drdavespsychologypage.homestead.com/Reinforcement__Random.pdf Be aware that even mere attention can be a reinforcer.
December 22, 2013

math
Since x has to be negative, -6<x<0.
December 22, 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 from the mean for both Z scores. Add the two probabilities.
December 22, 2013

Statistics
a. 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. b. The training program will not change the test ...
December 20, 2013

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
Right
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

statistics-PLEASE HELP quick
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

Science, very urgent please help
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
Since I don't know the answer to your question, I searched Google under the key words "children adults anxiety depression" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=children+adults+anxiety+depression&ie=UTF-8&oe=UTF-8 In ...
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

8th Grade Writing
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 (?)
What is your question?
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 (?)
What is your question?
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
https://www.google.com/search?client=safari&rls=en&q=punnett+square+explained+for+kids&ie=UTF-8&oe=UTF-8
December 12, 2013

English (?)
What is your question?
December 12, 2013

science
Are you talking about a Punnett square? https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8
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

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