Wednesday
July 29, 2015

Posts by PsyDAG


Total # Posts: 20,060

appliances
Since this is not my area of expertise, I searched Google under the key words "purpose of the external jumper wire on a variable-speed reversing drill switch" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=purpose+of+the+external+...
June 18, 2015

Statistics
Look at the abscissa (X-axis) for the value of 2.
June 17, 2015

math
Got it!
June 17, 2015

math
If the final = four regular exams: Mean = ∑x/n = ((87*4) + 70 + 92)/6 = ?
June 17, 2015

math
Lacking needed data.
June 17, 2015

psychology
I searched Google under the key words "how depression affects friendships" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=clinical+depression+friendships&ie=UTF-8&oe=UTF-8&gws_rd=ssl#q=how+depression+affects+friendships In the ...
June 17, 2015

Stats
No data given.
June 16, 2015

algebra
What is your question?
June 16, 2015

math
V = w * L + h = 4 * 23 * 7 = 644 Yep!
June 16, 2015

Math
Assuming that it is a square with three matchsticks on each side, matchsticks can be added internally to give nine squares with each side of one matchstick.
June 15, 2015

Math
"ordered pairs"? Total cost = $30x
June 15, 2015

statistics
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 deviation = square root of variance 95% = mean ± 1.96 ...
June 15, 2015

Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.005) and its Z score. 99% = mean ± Z * SEm SEm = SD/√n = s/√N
June 14, 2015

math
100,000
June 14, 2015

Statistics
Neither. r varies between +1 and -1.
June 13, 2015

Statistics
95% = 148 ± 1.96 (35/30) =148 ± 1.96(1.17) = 148 ± 2.287 = 145.713, 150.287 Is that what you calculated?
June 12, 2015

math
Typos. If you draw 12, how would you get "5 out of 10" any color?
June 12, 2015

STATS
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/56 * 1/(56-1) * 1/59 = ?
June 12, 2015

Statistics
Use correlation coefficient. https://www.google.com/search?client=safari&rls=en&q=correlation+coefficient&ie=UTF-8&oe=UTF-8&gws_rd=ssl
June 12, 2015

Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.005) and its Z score. 3 = Z (s/√n) = 2.575 (15.8/√n) Solve for n.
June 12, 2015

Statistics
Agree.
June 11, 2015

Math (Finite)
Lacking data. What is the makeup of the group they are selected from?
June 11, 2015

Math (Finite)
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 10^5 = ?
June 11, 2015

Biology
Use Pennett square for father (pp) and mother (Np). https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
June 11, 2015

Math
What parts?
June 11, 2015

Stats
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.
June 11, 2015

Stats
See later post.
June 11, 2015

Biology
Use Punnett square. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
June 9, 2015

statistics
P = 100!/(2!)(100-2)! = 100!/(2)(98!) = 100*99/2 = 9900/2 = ?
June 9, 2015

statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
June 8, 2015

Stats
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 between the two Z scores.
June 7, 2015

Algebra
Welcome
June 7, 2015

Algebra
The answers you have chosen are right. For unanswered problem, .018 * 800 = ?
June 7, 2015

math
V = π r^2 * h = π (8/2)^2 * 8 = π * 16 * 8 = ?
June 6, 2015

math
P = n!/r!(n-r)! = 7!/5!(7-5)! = (7*6)/2 = ?
June 6, 2015

math
V = π r^2 h = π (14/2)^2 * 20 = π 49 * 20 = 980 π 980 π = π (10)^2 * h 980 = 100h Solve for h.
June 6, 2015

Math
32/(18+30+32) = ?
June 6, 2015

Stats
No numerical data.
June 5, 2015

Bio
Changes
June 4, 2015

HELP!! Statistics!
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 deviation = square root of variance Z = (mean1 - mean2)/...
June 3, 2015

Algebra 1
Z = (score-mean)/SD
June 3, 2015

Algebra
Z = (score-mean)/SD
June 3, 2015

Algebra 1
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/5 * 2/3 = probability they are chosen for speaking roles. Subtract from 1 to get chorus probability.
June 2, 2015

math algabra
W = 2L W * L = 162 2L * L = 162 Solve for L then W.
June 2, 2015

STATISTICS
Lacking Data.
June 2, 2015

Math
Welcome
June 1, 2015

Math
f(x) = .5(2x) = .5(2*2) = .5(4) = 2
June 1, 2015

health
However, they can be reduced or eliminated, if the person seeks therapy from a qualified psychotherapist. https://www.google.com/search?client=safari&rls=en&q=treating+anxiety+disorders&ie=UTF-8&oe=UTF-8&gws_rd=ssl
June 1, 2015

health
However, they can be reduced or eliminated, if the person seeks therapy from a qualified psychotherapist.
June 1, 2015

Math (Statistics)
Data lacking. Without knowing population mean, standard deviation and sample size, it is impossible to know. 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 ...
May 31, 2015

Algebra 1
I saw 130, which minus 4 = 126.
May 31, 2015

Algebra 1
In contrast to Reiny, I factor to get (2x+18)(x-7) = 0 Since the distance cannot be negative: x = 7 x + 2 = 9
May 31, 2015

Algebra 1
Factor to solve for x, which cannot be negative. 126 = 3 * 2 * 7 * 3 = 18 * -7 Work it from there.
May 31, 2015

Statistics
Welcome!
May 30, 2015

Statistics
.1 + .1 + .2 = .4
May 30, 2015

Math, help plz
Data lacking. Whichever has the smallest frequency.
May 30, 2015

science
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. Google each of those terms. Don't just copy the material. Express the ideas in your own ...
May 30, 2015

Algebra
If n = 150% m = 1.5m n > m
May 29, 2015

Algebra
You did a good job with a. If there are no parentheses, multiply first before adding or subtracting.
May 28, 2015

Algebra
-18 ≠ 18 I'll leave you to show the steps. x = 17
May 28, 2015

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.
May 28, 2015

English
Agree
May 28, 2015

Biology ASAP
1. afferent vs. efferent vs. interneurons (look up) 2. http://en.wikipedia.org/wiki/Cochlear_nerve
May 28, 2015

Science (theory of evolution)
https://www.google.com/search?client=safari&rls=en&q=cladogram+worksheet&ie=UTF-8&oe=UTF-8&gws_rd=ssl
May 27, 2015

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.
May 27, 2015

1st grade math
Did you find it
May 27, 2015

1st grade math
How about 10 + 10 + 10 + 4 = 34? Cannot draw pictures on these posts.
May 27, 2015

Pychology
What are your choices?
May 27, 2015

Statistics 2023
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Assuming that you are saying that 23.8% of the 11.2% of the 20+ joggers are female, I would say .112 * .238 = ,0267. However, ...
May 27, 2015

INTERVAL OF THE MEAN
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. 90% = mean ± Z (SEm) SEm = SD/√n
May 26, 2015

Biology
Since this is not my area of expertise, I searched Google under the key words "radioactive decay" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=radioactive+decay&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
May 25, 2015

Algebra 1
No equations. Set both y's = to each other.
May 25, 2015

Statistics
To figure the probability, the pass mark is extraneous information, not needed. 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 ...
May 25, 2015

Stats
One is the opposite of the other. If the confidence interval = 95%, then the level of significance = P = .05, assuming a two-tailed test.
May 24, 2015

P.E.
Agree.
May 23, 2015

Math
Glad to see some of your thinking. I think what you call "explanatory" and "response" variables are what we call independent and dependent variables. "Confounding" = extraneous. Although weather is an extraneous variable, weather effects can be ...
May 23, 2015

Math
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.
May 23, 2015

Stats
a. Z = (score-mean)/SD = (6820-7500)/1750 = -.39 Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score = .3483. b. Mean the same, but SEm = SD√n. Standard Error ...
May 23, 2015

Statistics
However, if you need sample of thousands to get statistical significance, it probably is not of practical significance in individual cases.
May 23, 2015

Statistics
https://www.google.com/search?client=safari&rls=en&q=practical+statistical+significance&ie=UTF-8&oe=UTF-8&gws_rd=ssl
May 23, 2015

Math
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.
May 22, 2015

English
Since this is not my area of expertise, I searched Google under the key words "interpreting scantron scores" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=reading+scantron+scores&ie=UTF-8&oe=UTF-8&gws_rd=ssl#rls=en&q=interpreting...
May 22, 2015

algebra
(2n^2+5n+4)(-4) = -8n^2 - 20n - 16 (2n^2+5n+4)(2n) = 4n^3 + 10n^2 + 8n Combine like terms. Looks like you have typos for C.
May 22, 2015

Algebra
Without the graphs, we cannot adequately respond.
May 22, 2015

5 th grade math
Process: 1 lb = 16 oz .30 * 16 oz = $4.80
May 21, 2015

algebra
agree.
May 21, 2015

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.
May 21, 2015

algebra
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. a^4b + a^2 b^3 = a^2b(a^2+b^2)
May 21, 2015

math
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.
May 21, 2015

Math
120/30 = x/84 Solve for x.
May 21, 2015

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. Multiply by 800.
May 21, 2015

math
What is your question?
May 21, 2015

biology
Since this is not my area of expertise, I searched Google under the key words "unsaturated alkenes" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=obesity&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information ...
May 21, 2015

Prob and Stats
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.
May 21, 2015

CSIR General Aptitude
What figure?
May 20, 2015

probability self study
Once you find the silver watch, you can eliminate the box with the two gold watches. So it is either the box with the two silver watches or the one with gold and silver, two possibilities = 1/2.
May 19, 2015

Math
4/(8-1) = ?
May 19, 2015

math
Get rid of parentheses. 9z+8+6-12z-9 = 40 Combine terms. -3z + 5 = 40 Subtract 5 from both sides and then divide by -3.
May 19, 2015

math
Add 4 to both sides, then multiply both sides by 3.
May 19, 2015

science (any tutor)
Good for you!
May 19, 2015

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