Thursday
July 24, 2014

Posts by PsyDAG


Total # Posts: 17,969

Biology (?)
What problem do you want to identify?

Biology (?)
What hypothesis?

Biology
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. Extraneous variables — other than the independent ...

math
1/2 = 5/10 7/10 > 5/10

Biology
To keep from coming to false conclusions, those not backed by empirical evidence.

Biology
Do you have it plugged in?

Science
independent variable?

Science
determiner?

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

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

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 ...

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

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

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

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.

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…."

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

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

statistics
Agree, ± 68% of the time.

statistics
True, ±3 SD < range.

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.

college algebra
We can't do it on these posts.

college algebra (?)
We cannot see the figures on these posts.

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 = ?

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.

statistics
True

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

science
http://en.wikipedia.org/wiki/Amnesia

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

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

statistics
Don't agree.

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...

Science
Yes, that is the only behavior listed.

Science
Agree.

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

Psy.
C http://drdavespsychologypage.homestead.com/Good_Vs__Evil.pdf

math
http://www.youtube.com/watch?v=wRttEDsPQ-g

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=UT...

language art(1 question)
I disagree.

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 i...

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.

math
Since x has to be negative, -6<x<0.

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.

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 sco...

Statistics
a. They are further away from the mean. b. It decreases proportionately.

Statistics
True, you hope that the effect is significant.

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). Sub...

math
22(140 + .12(475) = ?

math
You are right. I forgot to include the 10 in the range.

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 = ?

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

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?

Science
(20 * .5)/2 = ?

Math
2 + 2 + 5 + 7 + 3 = 19 210 + 2 = 212

Math
180, 181, 182, 183 or 184

Math (?)
No table shown.

English
Right

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.

math (?)
More data needed. Equivalent of what?

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

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

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 ...

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

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.

math
3,221/10,276 = ? * 100

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.

science
We do not have your text.

statistic (??)
No table given. More data needed.

science
Compounds have different properties than their elements.

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

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

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 te...

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 ...

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

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 te...

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.

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.

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/

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?

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

Stastics
You are welcome.

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

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...

statistic (?)
What is your question?

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...

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

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

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 equat...

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

Statistics (?)
What is your question?

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

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

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

Sentence Agreement Errors
subject/verb agreement error "One… were…."

Science (?)
What terms?

biology
https://www.google.com/search?client=safari&rls=en&q=punnett+square+explained+for+kids&ie=UTF-8&oe=UTF-8

English (?)
What is your question?

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

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.

Science (?)
None listed.

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