Monday
May 25, 2015

Posts by PsyDAG


Total # Posts: 19,880

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.
April 4, 2015

Music
Since this is not my area of expertise, I searched Google under the key words "how to compose music" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=how+to+compose+music&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
April 4, 2015

project child care
Not unless you post the information.
April 3, 2015

child development
Your choice is split-half reliability.
April 3, 2015

age question
24 + x = 3x Solve for x.
April 3, 2015

variation
What is your question?
April 2, 2015

math
x+ y = 33 x + 3y = 81 Subtract first equation from second. 2y = 48 Take it from here.
April 2, 2015

math please help
No diagram, so we don't have any idea about F. You cannot copy and paste here.
April 2, 2015

fluids
Since this is not my area of expertise, I searched Google under the key words "benefits of a fluid system" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=benefits+of+a+fluid+system&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you ...
April 1, 2015

math (urgent)
It would help if you proofread your questions before you posted them. Is 20,000 missing a zero, or does 140,000 have an extra zero?
April 1, 2015

Algebra 2
A percentile is a measure used indicating the value below which a given percentage of observations in a group of observations fall. Arrange in order of value, lowest to highest. Third value = 30th percentile.
April 1, 2015

Math
315/1901 = ?
April 1, 2015

prob. & stat.
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 15/24 * 15/24 = ?
April 1, 2015

Algebra Please Help
if x = 0, then y = 0^2 + (-3) = 0^2 - 3 = ? Do the same with the other x values.
April 1, 2015

Algebra Please Help
Substitute the x values in the equation and solve to find values of y.
April 1, 2015

math
time = distance/speed min time = (400,000-100,000)/(3500+500) = 75 max time = (400,000+100,000)/(3500-500) = 166.7 I don't get those answers either.
March 31, 2015

statistics
a) Z = (score-mean)/SD Variance = SD^2 Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to Z. b) Multiply probability by 109.
March 31, 2015

statistics
I searched Google under the key words "alpha level critical value" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=alpha+level+critical+value&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information you desire more ...
March 31, 2015

statistics
Null hypothesis will be rejected if p ≤ .01. Is .05 < .01?
March 31, 2015

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .83^6 * (1-.83)^2 = ?
March 31, 2015

maths
(1-3/4) * 1/3 = ?
March 31, 2015

Ethics & Social Responsibility
You cannot copy and paste here.
March 31, 2015

maths
3/5 grapes - 1/5 apples = ?
March 31, 2015

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. (24 * 72)^2 = ? Multiply 24 by 72, then multiply that answer by itself.
March 30, 2015

Psychology
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.
March 30, 2015

Math
Unless you know the total amount of boys and girls, I would agree.
March 30, 2015

science help
Since this is not my area of expertise, I searched Google under the key words "rubidium electrons" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=rubidium+electrons&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
March 30, 2015

math
What other fraction?
March 30, 2015

Algebra
6 * 2 = 12 ft^2 for the bottom. How high are the sides?
March 30, 2015

maths
It would help if you proofread your questions before you posted them. Data missing. "marked __ out of a total of 200 marks." mean = ∑x/n
March 30, 2015

COMMON CORE MATH
In relation to what context?
March 29, 2015

Psychology 202
Cognitive?
March 29, 2015

Pschology 202
Typically.
March 29, 2015

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (±.025) and its Z score. 95% = mean ± Z SEm SEm = SD/√n
March 29, 2015

Stats
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (±.05, ±.025, ±.005) to get the Z scores. % = mean ± Z SEm SEm = SD/√n
March 29, 2015

math
What hexagons? Cannot copy and paste here.
March 29, 2015

statistics
Z = (score-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 related to the Z score. Is it ≤ .05?
March 29, 2015

statistics
When you get the missing data: 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.
March 28, 2015

Body Systems II
away from
March 28, 2015

math
If they are uniformly distributed: (55-50.75)/10 = ?
March 28, 2015

math
How many inches?
March 27, 2015

Math Help!!!
f(x) = 3(1.5) - 2 = ?
March 27, 2015

Algebra
-4x + 9y = 9 Multiply second equation by 3. 3x - 9y = -18 Add the two equations. -x = -9 x = 9 Insert x value in the first equation to find y.
March 27, 2015

Math
2 quarters = $.50 3 dimes = $.30 3 nickels = $.15
March 27, 2015

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.
March 27, 2015

statistics
Z = (score-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 related to the Z score.
March 27, 2015

Math-Lit 143
Lacking Data.
March 26, 2015

College Algebra
A square will give the largest possible area. 60x + 20x + 20x = 1,500 Solve for x.
March 26, 2015

Math
There are 36 possibilities. Four can be obtained by 1,3; 3,1; 2,2. So 3/36 = ?
March 26, 2015

algebra
No equation.
March 26, 2015

math
Please do not use all caps. Not only is it harder to read, but it is like SHOUTING online. Thank you. I assume you want to know ages of Alyssa and Jeff. If Sarah is 8, then Jeff is 2 * 8 = ? Alyssa is 4 * ? = ??
March 25, 2015

math
Lacking data. Need to know total band members.
March 25, 2015

math
1. How many numbers are (less than) <2? 2. Right 3. "Complement of 4" means all the numbers that are not 4.
March 25, 2015

English
I would use the synonym of "conserve."
March 25, 2015

Science, genetics
The genotypes are ss and Ls. Use a Punnett square. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
March 25, 2015

Algebra
"≤" means "smaller than or equal to." I don't know how a dot fits in.
March 25, 2015

math
F = S - 401 F + S = 3391 Substitute S-401 for F in the second equation and solve for S. Insert that value into the first equation to solve for F. Check by putting both values into the second equation.
March 25, 2015

Algebra 2
There are 36 combinations of two dice. Even sums include; 1,1 2,2 3,3 4,4 5,5 6,6 2,4 4,2 1,3 3,1 3,5 5,3 4,6 6,4 If I have all the even combinations = 14/36 = ?
March 25, 2015

speech
cliff?
March 25, 2015

statistics
Right, but to get percentage, you need to multiply by 100.
March 25, 2015

Please help me with Psychology
Could do an experiment, but what would you use as a control group?
March 24, 2015

science
Since this is not my area of expertise, I searched Google under the key words "electrical deduction" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=electrical+deduction&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
March 24, 2015

Science
Although this is not my area of expertise, those last choices sound better.
March 24, 2015

Math
Right, but online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 3.1 * 10^-6
March 24, 2015

Math
Right, but online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 6.98269 * 10^5 However, you could also round it. 6.98 * 10^5
March 24, 2015

Math
Right.
March 24, 2015

Biology
Google each term.
March 24, 2015

maths
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Since 3 sides are even and 3 are odd, the chances of even = 3/6 = 1/2. For three dice, probability of all even = (1/2)^3 = 1/2...
March 24, 2015

Math, Algebra
B = A/2 B = C + 1/12 = 1/6 + 1/12 = 2/12 + 1/12 = ? Put answer to second equation into the first to find A, then add the two.
March 24, 2015

Math
If it is a rectangular prism, why would you sketch a triangle? First, find the perimeter, 2L + 2W. Then multiply by 200/4, "the top quarter of each vertical face."
March 23, 2015

statistis
Range = highest score - lowest. Find the mean = 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 deviation = square root of variance...
March 23, 2015

pls help me pre algebra
2^3/2^3 = (2*2*2)/(2*2*2) They cancel each other out, which gives you 1.
March 23, 2015

math
Also, indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 23, 2015

expressions
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. I agree with your answers. 5^2 * 5^4 = 5^6 3^3 * 3^6 = 3^9
March 23, 2015

Statistics
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to your Z scores.
March 23, 2015

algebra
7.2 - 8.6 + 9.3 + 5.4 = 13.3
March 23, 2015

Probability & Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (± .025) and its Z score = 1.96 95% = mean ± 1.96 SEm SEm = SD/√n
March 23, 2015

biology/evolution
Does it fool pollinators into believing that it does?
March 22, 2015

analytical tools
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .74^4 * (1-.74) = ?
March 22, 2015

Biology needs help
Medhat's response makes it look like the post has been answered.
March 22, 2015

Probability and Statistcis
I don't know what five numbers you are seeking, but this might be a partial response. 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 ...
March 22, 2015

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .05^10 = ?
March 22, 2015

Science Please
6. correct 7. wrong 8. right 9. wrong 10. disagree
March 22, 2015

Biology
Right, all are tall and half are yellow.
March 22, 2015

math
"Before the third card is chosen" means a 1 is chosen as either the first card or second card. Probability of 1 being chosen as first card = 2/6. Assuming that the first card was not a 1, the probability of 1 being chosen as a second card = 2/5. Either-or ...
March 22, 2015

Psychology help
Not sure what you seek. Acknowledging positive achievements?
March 22, 2015

Life orientation
What is NFSAS?
March 22, 2015

math
x would be the height and 6 - 2x would be the length/width.
March 22, 2015

algebra
100 * (3,000-237)/3,000 = ?
March 21, 2015

English
"Go" is not necessary. "Sic" indicates that it was as written, even if erroneous. “you’re ready to go (sic) do something else’’ (Jordan, first name, year, possibly page if book) https://www.google.com/search?client=safari&rls=en&q=text+...
March 21, 2015

math
A = S + 8 17A + 9S = 4,400 Substitute S+8 for A in the second equation and solve for S. Insert that value into the first equation to solve for A. Check by putting both values into the second equation.
March 21, 2015

Math
We cannot graph on these posts.
March 21, 2015

maths
Convert cm to mm by multiplying by 10. V = πr^2h = π * 140^2 * 100 = π * 19600 * 100 = 1,960,000π 1,960,000π = π2^2h = π4h Solve for h = length
March 21, 2015

math
Lacking data. How many numbers are there? The probability of hitting a particular number is the same no matter which spin it is.
March 21, 2015

Help with Psychology regarding Positive Correlatio
With a positive correlation, both variables increase/decrease together.
March 21, 2015

Genetics (science)
Both are Bb. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
March 21, 2015

Science
Man is FF, woman is aa. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
March 21, 2015

statistic
No data. You cannot copy and paste here.
March 21, 2015

statistics (jay)
If you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.
March 20, 2015

statistics (etoile)
Ho: M = E Ha: M < E 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 ...
March 20, 2015

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