Tuesday
May 26, 2015

Posts by PsyDAG


Total # Posts: 19,882

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 of the Z score. Is it ≤ .01?
March 7, 2015

Maths literacy,life science,physical science,consu
Talk to your school counselor. Assuming that your abilities are adequate or better in all these areas, s/he will have interest tests to help you decide.
March 7, 2015

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 100+91*3+94+93+82+89/8 = Do multiplication and division first. 100+273+94+93+82+11.125 ≠ 116,375
March 7, 2015

SAT Math
3x + 4y = 10, if x = 2 and y = 1.
March 7, 2015

Maths
Speed = 50/45 = x/60 Solve for x.
March 7, 2015

statistics
Z = (score-mean)/SEm SEm = SD/√n Use Z table, as indicated in previous posts.
March 7, 2015

science
If some catastrophe effected that phenotype, there would be no survivors. Also, the genotypes are chance combinations of genes, some of which may have mutated.
March 6, 2015

science
Assuming B = dominant and b = recessive, then the organism would be tall.
March 6, 2015

Goof
Sorry, I originally read as second pair free. 1.06 (2 * 24.99 + 12.50) = ?
March 6, 2015

MATH
Right.
March 6, 2015

help
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 you out. The area is much too broad. You could write books dealing ...
March 6, 2015

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 6, 2015

science
Lizards have legs.
March 6, 2015

math
What digits?
March 5, 2015

Statistics/Probability
a. See process in later post. b. Z = (score-mean)/SEm SEm = SD/√n Use same table. C. Judge by your results.
March 5, 2015

Math 6th grade
Since this is not my area of expertise, I searched Google under the key words "math neutral field" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=math+neutral+field&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
March 4, 2015

statistics/normal distribution
Another method: 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.
March 4, 2015

statistics/Help Please!!
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 SEm = SD/√n Find ...
March 4, 2015

surface area of solid shapes
V = 1/3. 22/7. r^2 .h π = 22/7 3V/πh = r^2 Take it from there.
March 4, 2015

algebra
L * W = 120 6W = 120 3W = ?
March 4, 2015

Math Check
Right!
March 4, 2015

Business (?) needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 4, 2015

math needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 4, 2015

statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. a. 4/6 * 3/8 = ? b. same process c. Either-or probabilities are found by adding the individual probabilities. 4/6 * 5/8 + 2/6 * ...
March 4, 2015

Probabilities
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual ...
March 4, 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.
March 4, 2015

math
3x + 5*6 + 2x Simplify.
March 3, 2015

math
L * W = area area = (L-z)(W)
March 3, 2015

math
Area = L * W Area/L = W
March 3, 2015

math
Insufficient data.
March 3, 2015

Math
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. I don't know if this answer is too advanced for 4th grade. Let one number = x and the other = y. x + y = 7 2/8 x - y = 2 4/8 Add the two ...
March 3, 2015

MATH
35 * 6/7 * 4/5 = ?
March 3, 2015

Math (?)
What rectangle and what circle?
March 3, 2015

Science
Agree with all.
March 3, 2015

Child education
Since it says "NOT," I would agree with A.
March 3, 2015

6th Grade Math
-82 + 15*5 = ?
March 3, 2015

word problem
73 - 5 = 68 If she puts 5 cupcakes in each container = 65, she will have 3 left over.
March 3, 2015

Statistics
Lacking sample data. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (±.05) to get the Z score. 90% = mean ± 1.645 SEm SEm = SD/√n
March 3, 2015

6TH GRADE MATH
Definitely 2.
March 3, 2015

Statistics
There are 36 total possibilities in rolling two dice. you are looking to get 5, 6, 7, 8, 9, 10, 11, or 12. Rather than looking for all of these, do the reverse 2, 3 or 4, and subtract from 36. 1,1 2,1 1,2 2,2
March 3, 2015

math
n^2 + (n+1)^2 = 265 Solve for n.
March 3, 2015

Math- Data Management
mean = ∑x/n 9 = (10*8 + x)/11 Solve for x.
March 2, 2015

Math
Only the first one is right. Black = 12/2 = 6 Silver = 12/6 ≠ 1 Other = 12 - 12/6 - 12/2 = ?
March 2, 2015

Algebra
I thought I already answered this. 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. Is it .75?
March 2, 2015

pre algebra
If you subtract the second equation from the first, you get: -2x = 8 x = -4 Substitute that into either equation to find the value of y.
March 2, 2015

Math
Right.
March 2, 2015

math
If you are talking about the typical, fair, six-sided die, it = 1/6
March 2, 2015

Math
25 + 12 + 30 - 17 = ?
March 2, 2015

pschology
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. Just as a start: What test is being used to analyze the data?
March 2, 2015

Statistics
The sample mean is a measure of central tendency, while the standard deviation is a measure of variability.
March 2, 2015

History
Manufacturing ability?
March 2, 2015

general math
f = 3c f+5 = 2(c+5) Substitute 3c for f in the second equation and solve for c. Insert that value into the first equation to solve for f. Check by putting both values into the second equation.
March 2, 2015

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .6 * (1-3/4) * 640 = ?
March 2, 2015

math
Insufficient data. What are relationships between d and c to r?
March 1, 2015

algebra
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. Is it close to .75?
March 1, 2015

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

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