Saturday
August 29, 2015

Posts by PsyDAG


Total # Posts: 20,134

math
6 * 3 = 18 - 1 = 17 Adjust positives and negatives.
March 1, 2015

biology
If the number of chromosomes doubles in each generation, what would that do? If that doesn't happen, what has occurred?
March 1, 2015

math
$5.75v > $99 + $.50v
March 1, 2015

statistics
Insufficient data. Mean? Standard deviation? 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 below each Z value. Multiply by 100.
March 1, 2015

Math
Mean = ∑x/n 5.8 = (13*5.9 + x)/14 Solve for x.
March 1, 2015

funfamental concepts
disagree.
March 1, 2015

Simultaneous equations
3x = 14y x = 14y/3 x-4y+1=0 Substitute 14y/3 for x in the third equation and solve for y. Insert that value into the first equation to solve for x. Check by putting both values into the second equation.
March 1, 2015

math
If they are 90% and 80% in each of the subjects, of course Vani scores better.
March 1, 2015

math
Let s = shortest side, then longest = s+6 and 2s = third side. s + (s+6) + 2s = 25 Solve for s then the others.
March 1, 2015

math
Use Pythagorean theorem.
March 1, 2015

statistics
99% = mean ± 2.575 SEm SEm = SD/√n
March 1, 2015

statistics
What is your question?
March 1, 2015

applying fundamental concepts
I would disagree. Look them up in your text's table of contents or Google the terms.
March 1, 2015

tablun elementary school
(7x-8y)^2
March 1, 2015

Statistics/check answer
Right
March 1, 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 1, 2015

Statistics
a. Don't understand what you are seeking. 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 related to the Z score. Cannot graph on these posts. c. Use...
March 1, 2015

Math
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 the Z score.
March 1, 2015

statistics
Need to have specific example.
February 28, 2015

Math
I'm not sure what you want. Multiply by 4n and 5m^2. 15m^3 * 8n^2
February 28, 2015

Health
There are many nutrition myths. https://www.google.com/search?client=safari&rls=en&q=nutrition+myth&ie=UTF-8&oe=UTF-8&gws_rd=ssl
February 28, 2015

Math
You cannot copy and paste here.
February 27, 2015

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for Z = ±1.96. Hint: It is the area between Z and the mean.
February 27, 2015

Statistics
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 of the Z score.
February 27, 2015

statistics
https://www.google.com/search?client=safari&rls=en&q=probability+of+being+born+on+the+same+date&ie=UTF-8&oe=UTF-8&gws_rd=ssl
February 27, 2015

PSYCH
28 is right.
February 27, 2015

Math
11/16 = x/24 Solve for x.
February 27, 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 in the smaller area related to the Z score.
February 27, 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 ± 1.96 SEm SEm = SD/√n
February 27, 2015

Science
They all look good.
February 27, 2015

Statistics
The below is assuming a normal distribution. However this is not true. Z = (score-mean)/SD = 0 - 3.7/3.3 = -1.12 This means that over 13% have never been assaulted. The distribution would be positively skewed. Find table in the back of your statistics text labeled something ...
February 27, 2015

s
Blood always leaves the heart in arteries and returns to the heart in veins.
February 27, 2015

math
5 and 6 are factors, but 7 is not. Explore multiples of 30.
February 27, 2015

Health
Agree
February 27, 2015

math
40(2) + 150(.30) = ?
February 27, 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 ± 2.575 SEm SEm = SD/√n
February 27, 2015

health
Do you have choices? Cerebellum? Precentral gyrus?
February 27, 2015

algebra
A. No B. Assume you have 5 quarters and 3 dimes. Add any amount to that to see what happens.
February 27, 2015

math fractions
5/total coins = ? Dollar bills are not coins.
February 27, 2015

Algebra 1
5x + 7y = 3 2x + 3y = 1 Multiply first equation by 2 and second by 5. Subtract first equation from second.
February 26, 2015

Math
2/5(1/5) +(1-2/5)(1/3) = ?
February 26, 2015

statistics
Z = (score-mean)/SD Do you know the 68-95-99.7 rule? Approximately 68% of scores in normal distribution are within one standard deviation (Z)(34% on each side of the mean), 95% within 2 SD, and 99.7% within 3 SD.
February 26, 2015

Math - Algebra
Could be that the ride home be downhill?
February 26, 2015

Math (?)
37 + 58 = 95 ≠ 220
February 26, 2015

Math?
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. What is your question?
February 26, 2015

math
x < 45 3x > 5 127 ≤ x x ≤ 50
February 26, 2015

algebra
Factor the 6. Which factor times 3 plus the other factor = 11?
February 25, 2015

Math
I don't get one of those answers either. 45 - 30 = 15
February 25, 2015

math
You do not add another 30 to each of the fractions. 30 + 30/3 + 30/5 = 30 + 10 + 6 = 46
February 25, 2015

Algebra 2
(-2)^2 + 4(-2) = 4 - 8 = -4
February 25, 2015

Urgent math help
X intercept is where y = 0. Insert value and calculate.
February 25, 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.
February 25, 2015

Algebra
I don't know how you reached that answer either. a^1/a^2 = (a)/(a*a) = 1/a
February 25, 2015

Communications
If Tay was really talking about fly fishing, he won't need a frying pan, but will need enough space in the classroom to demonstrate the casting and using the landing net. Will you be wearing waders?
February 25, 2015

Math
V = 4/3π*r^3 Insert values and calculate.
February 25, 2015

math
2c + 2p + pot = 10.20 p = c/2 pot = c + 3 Substitute c terms for p and pot to solve for c. Then use third equation to solve for pot.
February 25, 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. See your later post.
February 25, 2015

Math
3J = G (J +15) + (G + 15) = 110 Substitute 3J for G in the second equation and solve for J. Insert that value into the first equation to solve for G. Add 15 to each.
February 25, 2015

intermediatealgera
Multiply all terms by x. 2x - 2x - 4 - 2x Combine like terms.
February 25, 2015

intermediatealgera
Use process indicated in your following post.
February 25, 2015

Arithmetic
One must be negative. Try factoring -70.
February 24, 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. I'll let you do the calculations.
February 24, 2015

algebra1
Use process suggested in previous post.
February 24, 2015

Algebra 1
Subtract first equation from the second.
February 24, 2015

Statistics
Mode http://drdavespsychologypage.homestead.com/Two___Two_____four.pdf
February 24, 2015

math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. If replacement, then: 3/12 * 5/12 = ?
February 24, 2015

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability to the left of Z. Since Z is negative, it is in the smaller portion.
February 24, 2015

statistics
Use Z table.
February 24, 2015

maths-probability
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 2/n * 1/(n-1) = 1/28 If they haven't been replaced, the probability of picking a red = 0.
February 24, 2015

Biology - Genetics
An autosome is a chromosome that is not an allosome (i.e., not a sex chromosome). Autosomes appear in pairs whose members have the same form but differ from other pairs in a diploid cell, whereas members of an allosome pair (XX, XY) may differ from one another and thereby ...
February 23, 2015

Math
3/2 * 18 = ?
February 23, 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 between the two Z scores. Multiply by 100.
February 23, 2015

Psych 42 (Stats)
Same process as following post from Alecia.
February 23, 2015

Science
Since this is not my area of expertise, I searched Google under the key words "fluorine element" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=fluorine+element&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
February 23, 2015

child psychology in general
I definitely agree with B. Assuming that the experiments were not faulty, the theory needs to be rejected or at least modified.
February 23, 2015

Maths
272 + 325 = ?
February 22, 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 ± 1.96 SEm SEm = SD/√n
February 22, 2015

math
(x-1)(x+2)-(x-3)^2 = (x^2+x-2) - (x^2-6x+9) = x^2+x-2-x^2+6x-9 = ? Combine like terms.
February 22, 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. However, I will start it for you. A. 400 + 1 = 401
February 22, 2015

statistics
16/40 Reduce.
February 22, 2015

statistics
You cannot copy and paste here.
February 21, 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. However, I will begin. A. Does cell phone radiation increase the probability of tumors?
February 21, 2015

math
P = 2L + 2W = 36 + 12 = 48 cm Since you are rounding the error for each L and W < .5 cm. With 4 sides, the should be < 2 cm. Now, you find the percentage.
February 21, 2015

math
agree.
February 21, 2015

statistics
Z = (score-mean)/SD ±3 = (score-158)/8 Solve for both the negative and positive values.
February 21, 2015

Math
C = πd = 3.14 * 2.5 = ? Area of towel = ? * 10 * 15 Of course, this will be a little off, since the circumference will increase as the layers accumulate.
February 20, 2015

Last help Thanks
The ratio is 4:7, but the odds are 4/11, # Ss vs the total possible choices.
February 20, 2015

Satistics Help
Typos? Odds of winning = a/(a+b) = # winning games over total.
February 20, 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 I'll let you do the ...
February 20, 2015

Psyc
What is your question? You cannot copy and paste here.
February 20, 2015

life orientation
I assume you are talking about approach-avoidance conflicts, which will lead to vacillation (alternating approach and avoidance without ever accomplishing the goal). Types of Internal Conflicts I. Approach-approach involves two or more positive goals. It is easily resolved (...
February 20, 2015

Math
72º/3 = 24º per slice 360º/24º = ?
February 19, 2015

Biology
Zunie forgot that the male is XY, and the Y chromosome does not contain a color vision gene. 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
February 19, 2015

Math
We do not have data for the number of chores, but we do have data for the number of hours worked. Again, hours of chores/summer month = 5 * 4 * 1.5 = 30 hours per 20 weeks If you do not have a typo, hours of chores/winter month = 6 hours per 28 weeks Mean = ∑x/n = (30+6...
February 19, 2015

Math
d = rt = 5 * 8/60 = ? ?/(10/60) = r = miles/hour
February 19, 2015

business math
It would help to know the specific problem.
February 19, 2015

math please help
First triangle has a perimeter of 18 = 3 + 7 + 8. 54/18 = 3 So if they are "similar," each side must be three times larger.
February 19, 2015

Anthropology
Formal sanctions typically involve fines, incarceration and/or execution. Informal sanctions typically involve scorn, rejection and/or exclusion.
February 19, 2015

math
Best estimate = 2/8 * 120 = ?
February 19, 2015

math
Best estimate = 6/300 = ? ? * 1800 = ??
February 19, 2015

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