Thursday
December 18, 2014

Posts by PsyDAG


Total # Posts: 18,863

Algebra
25h = 20h + 15 Solve for h.
November 15, 2014

math
√2x - 3 = 5 Solve for x.
November 15, 2014

statistics
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 of < 3.
November 14, 2014

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Online "^" is used to indicate an exponent, e.g., x^2 = x squared. (3.25*10^-22)(7*10^3) = ? Multiply the regular numbers and add the exponents.
November 12, 2014

Science
We all have a color, in contrast to being transparent. To hide from predators, life forms must match their background.
November 12, 2014

math
For every unit you move to the right, that is one negative power of 10. .000027 = 27*10^-6 .000009 = 9*10^-6 (27*10^-6)/(9*10^-6) = ? Divide numbers normally and subtract powers.
November 12, 2014

math
calculations
November 12, 2014

math
When multiplying, exponents are added. 10^5 * 10^1 = ?
November 12, 2014

statistics
A parameter is a measure on a population, while a statistic is a measure on a portion of the population, a sample.
November 12, 2014

math please help
22.75/350 = ? 24 = .4x Solve for x.
November 12, 2014

Probability
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
November 11, 2014

Math
W*L = A L = A/W Insert values and solve for L.
November 11, 2014

Math
If you are trying to find out how many hours the trip will take, you are correct.
November 11, 2014

Stats
The measure of variability for distribution of means is SEm. SEm = SD/√n As n increases, the SEm decreases.
November 11, 2014

Math
No. 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.
November 11, 2014

algebra
A = 3G-3 A + G = 17 (3G-3) + G = 17 Solve for G, then A.
November 11, 2014

Early Childhod Edu
Once they are sharing, 2.
November 10, 2014

English
Almost all of them. Don't you get sick of seeing the same ads again and again?
November 10, 2014

Math, Please Help!
P(1) = 12/52 If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P(2) = 12/52 * 11/51 p(3) = 12/52 * 11/51 * 10/50 P(4) = 12/52 * 11/51 * 10/50 * 9/49 The question is asking for ...
November 10, 2014

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/14 * 1/13 * 1/12 * 1/11 = ?
November 10, 2014

Science plz?
I searched Google under the key words "Meiosis" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=meiosis&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information you desire more quickly, if you use appropriate key ...
November 10, 2014

biology
variable?
November 10, 2014

Statistics
The scores in the "smaller portion" in the table would tell you how extreme the score is.
November 9, 2014

Statistics
The scores in the "smaller portion" would tell you how extreme the score is.
November 9, 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.
November 9, 2014

Early Childhood
Right.
November 9, 2014

Science
How about oxygen?
November 9, 2014

Math
Just a guess, asking for total price? 1.08($45.75) = ?
November 9, 2014

science
Solar refers to the sun.
November 9, 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 score.
November 5, 2014

algebra
a) w = 220 - l b) A = lw = l(220-l) c) A square would give you the greatest area.
November 4, 2014

5th grade math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Agree with first 3 answers. In 2 weeks, he picked 30 + 36 bags.
November 4, 2014

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 4, 2014

Math
Q3 is the value that 75% of the students score equal to or below.
November 4, 2014

math
14.5% = 14.5/100 = .145 Percent means "per 100"
November 4, 2014

Math
(7*28) - (14*3) - (11*3) = ?
November 3, 2014

Stats(?)
What is your question? Yes, the player is very likely to lose the $10.
November 3, 2014

Math
---- = 6/9 = 2/3 4/40 = 1/10 2/5 = 4/10 8/14 = 4/7
November 3, 2014

Sci207
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. We also do not have your textbook. Have you tried Googling "advances in agricultural ...
November 3, 2014

math
Convert all to tenths. 53/10 - 28/10 = ?
November 3, 2014

English
My best guesses for the first two would be "plants" and "environment" respectively. For the third, I would guess "extinct", but I don't see the connection with "no rain."
November 3, 2014

Geometry
7 = 5,2; 2,5; 3,4; 4,3; 6,1; 1,6 = 6/36 6 < 1,1; 2,2; 1,2; 2,1; 1,3; 3,1; 1,4; 4,1; 2,3; 3,2 = 10/36 Either-or probabilities are found by adding the individual probabilities.
November 3, 2014

Maths
Right.
November 3, 2014

science (?)
What are your choices?
November 3, 2014

science (?)
What are your choices? You cannot copy and paste here.
November 3, 2014

STAT
1A) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.05, .025, & .005, respectively) and their Z scores. % = mean ± Z SEm SEm = SD/√n 2A) Same process. 3) Data ...
November 2, 2014

science
Does your research of previous work indicate that music affects blood pressure? If so, then you can use any of the beginning sentences and title, although my preference is the second one. If not, then you might want to make your title and beginning sentence more general. Hint...
November 2, 2014

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.
November 2, 2014

maths
(11+x)(8+x) = 208 88 + 19x + x^2 = 208 x^2 +19x - 120 = 0 Factor and solve.
November 2, 2014

Statistics (?)
Inadequate data.
November 2, 2014

math
30/2 = ?
November 2, 2014

psychology
Hypothesis: sounds like Edwina is suffering from a generalized anxiety disorder.
November 1, 2014

Statistics
a) Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n = 15/√64 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 1, 2014

Statistics (?)
Lacking data. Need to have some measure of variability to solve.
November 1, 2014

algebra
x^2 - 6x + 9 + 10x - 300 + 24 Combine like terms. x^2 + 4x - 267 I can combine, but I can't find the factors. I hope this what you really wanted.
November 1, 2014

Intermediate 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.
November 1, 2014

College Intermediate Algebra
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Unless you forgot the power on the first x, 2x + 4x = 6x. Otherwise, you are on the right track.
November 1, 2014

math
What is the context? I have no idea of what the "**" means.
November 1, 2014

Math
Although I am not familiar with "Webassigns default tolerance," 7.52609 rounds to 7.53.
November 1, 2014

MATH
Yep.
November 1, 2014

Genetics
Since both parents have to be homozygous, all of F1 will be heterozygous (Bb). Do a Punnett square for F2. https://www.google.com/search?client=safari&rls=en&q=Punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
October 31, 2014

Genetics
I agree with you. Possibly that is a typo on the web page.
October 31, 2014

Genetics
https://www.google.com/search?client=safari&rls=en&q=Punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
October 31, 2014

statistics
Z = (score-mean)/SD SD = √variance Insert values and compute.
October 31, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "chemical bonding" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=chemical+bonding&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
October 31, 2014

statistics
Is this your book's rule? Do you know the 68-95-99.7 rule? Approximately 68% of scores in normal distribution are within one standard deviation (34% on each side of the mean), 95% within 2 SD, and 99.7% within 3 SD.
October 31, 2014

statistics
Don't know what book says, but this is another way. 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. Multiply by 100.
October 31, 2014

Math, Please Help! I don't understand!
37. Add 1 to both sides, then multiply that by a. 39. Multiply both sides by 3, then divide by π and r^2.
October 31, 2014

Algebra 1
You got it!
October 31, 2014

statistics
Z = (score-mean)/SD SD = √variance
October 30, 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 proportions/probabilities related to the Z score. Multiply by 100.
October 30, 2014

English
Although I don't believe the statement, "We are all equally wise."
October 30, 2014

math
(1-.55)x = 252 Solve for x.
October 30, 2014

Math
Look for two factors for each of the two end terms. 16 = 4,4 or 8,2 or 16,1 2 = only 2,1 By combining them, what will add to -14? Remember that one has to be negative. That is the beginning of your work. Carry on.
October 30, 2014

algebra (?)
What is your question?
October 30, 2014

Math--1 question?
To find the median, arrange score in order of value. Which has 15 as the middle-most value?
October 30, 2014

Algebra
x^2 + 6x + 5 = 0 (x+1)(x+5) = 0 x = -1 or -5
October 30, 2014

Math question
http://drdavespsychologypage.homestead.com/Two___Two_____four.pdf Nominal scales only use mode, Ordinal scales can use mode or median.
October 30, 2014

Math help!
Oops, I agree with your second answer.
October 30, 2014

Math help!
Pythagorean theorem. a^2 + b^2 = h^2 a^2 + 25 = 169 a^2 = 169 - 25 = 144 I would disagree.
October 30, 2014

math
A = 2x (A-5) = 3(x-5) Substitute 2x for A 2x-5 = 3x -15 -x = -10 x = 10
October 29, 2014

statistics
Z = (score-mean)/SD Insert values and compute Z.
October 29, 2014

Statistics
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.
October 29, 2014

Business Ethics
What are your choices?
October 29, 2014

Math
M = 2J M^2 + J^2 = 125 = (2J)^2 + j^2 = 4J^2 + J^2 = 5J^2 Solve for J.
October 29, 2014

Geometry Needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
October 29, 2014

Math
L = 8(2^2)/π^2 = 32/π^2 How far out do you want π in decimal places?
October 29, 2014

math algeba
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Online "^" is used to indicate an exponent, e.g., x^2 = x squared. (8.76*10^9)(6.52*10^-3)(13.27 * 10^-5) = When multiplying numbers, the exponents are added...
October 29, 2014

Algebra
No table shown. You cannot copy and paste here. 6 * 4 = 24 carnations 4 * 4 = 16 roses.
October 28, 2014

Math
Data is unclear. 4/5 What?
October 28, 2014

English
"As he…" seems awkward. 5 is better than 4.
October 28, 2014

Algebra
If the strawberries are multiplied by 3, the same needs to be done for the other fruits.
October 28, 2014

Math (?)
With your data, all I can get is last year + $800. What zero are you talking about?
October 28, 2014

Math
S = 1/3D + 3
October 28, 2014

statistics
a,b. 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 for the Z score. Multiply by 100. c. Find table in the back of your statistics text labeled something ...
October 28, 2014

Math help
Agree.
October 28, 2014

Statistics
95% = mean ± 1.96 SEm SEm = SD/√n
October 28, 2014

statistics
What is the claim? The way you have your data arranged make s them very difficult to read.
October 28, 2014

English
It could mean both, but I have the image of "grown-up." http://drdavespsychologypage.homestead.com/Decision_Trap.pdf
October 28, 2014

English
"A few days" is more specific and seemingly much shorter than "years." How about "recently," "not long ago," "a while ago?"
October 28, 2014

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