Thursday
August 25, 2016

Posts by PsyDAG

Total # Posts: 22,158

statistic concept application
Lacking data. Mean? Standard Deviation?
November 11, 2015

English
It could be either, but I would bet on the Park.
November 10, 2015

science help ASAP
Agree with first but not second.
November 10, 2015

science help
Disagree. Fighting is cooperative?
November 10, 2015

Math lacking data
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. It would help if you proofread your questions before you posted them.
November 10, 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.
November 10, 2015

math
36/4 = ?
November 10, 2015

Statistic
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 = (score-mean)/SEm SEm...
November 9, 2015

math
Since he always has the dollar bill, the problem then goes to how many ways can he make $.75 out of quarters and dimes. If both have to be used, it would only be 5 dimes and one quarter — one way. However, it could also be done with 3 quarters alone, giving you two ways. ...
November 9, 2015

math -4th grade
Agree with your answers.
November 9, 2015

4th grade 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.
November 9, 2015

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
November 9, 2015

Psychology
Haven't noticed Ms Sue haters, but even so, your post is unnecessary in inappropriate.
November 9, 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. Also, it would help if you proofread your questions before you posted them. Data is missing.
November 9, 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.
November 9, 2015

Statistics
a) For the population, what about the residents who are not listed in the phone book?
November 9, 2015

Spanish
¡Que bueno!
November 9, 2015

Spanish
¡verdad!
November 9, 2015

maths
Let x = starting sum x - x/2 - x/4 = 1.25 Multiply by 4. 4x - 2x - x = 5
November 9, 2015

Stats
a. 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 (SD) = 34 ± 2.575(12) b. Z = (score-mean)/SEm SEm = SD/&#...
November 9, 2015

Allide school
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. (52.5*32.5) - (50*30) = ?
November 9, 2015

math
a^2 + b^2 = c^2 Insert values to see which fits.
November 9, 2015

psychology
You would walk 30º to the right, but you will not adapt to the glasses, even trying to correct you perception, until using them for an extended period of time. I hope this helps.
November 9, 2015

psychology
So, what do YOU think? 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.
November 9, 2015

Comm Tech
Agree with #1, but not #2. No scatter plot available.
November 9, 2015

health
Which path? The ovum developing and coming down or the sperm coming up?
November 8, 2015

Statistics and probability
Getting a score 104 or higher: Z = (score-mean)/SD Getting a mean of 104 or higher: Z = (score-mean)/SEm SEm = SD/√n For both, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/...
November 8, 2015

math
a - c
November 8, 2015

statistic
c) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.99) and its Z score. Insert data into equation below. Z = (score-mean)/SD d) Using same table, Z = (score-mean)/SEm SEm = ...
November 7, 2015

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3/15 * 7/15 = ?
November 7, 2015

math
10 * -12 = -120
November 7, 2015

maths
Cannot draw shapes on these posts.
November 6, 2015

math's
It would help if you proofread your questions before you posted them. The average of how many numbers? What seven numbers?
November 5, 2015

SCIENCE 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.
November 5, 2015

Science
Since this is not my area of expertise, I searched Google under the key words "tools used to collect data in space" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=tools+used+to+collect+data+in+space&ie=UTF-8&oe=UTF-8&gws_rd=ssl In...
November 5, 2015

biology
Put the bag over the mouth of the beaker and push?
November 5, 2015

6th grade Math
1/4 * 8/2 = ?
November 5, 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. See your later post.
November 5, 2015

stat
What is your question?
November 5, 2015

Math 141
I assume that one die = 3. The other numbers to get ≤ 7 are 1, 2, 3, 4. Since the other die has six sides, what are the odds?
November 5, 2015

Math 141
I assume that on of one die = 3. The other numbers to get ≤ 7 are 1, 2, 3, 4. Since the other die has six sides, what are the odds?
November 5, 2015

Zibonele high school
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
November 5, 2015

Math
Correct as far as you went, but what are the probabilities? 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. D) Either-or ...
November 5, 2015

math
Takeoff, each stop and landing. How many is that?
November 5, 2015

Algebra 2
$2.50 + $2m = C $2/mile sound very high. Typo?
November 5, 2015

technical drawing
Cannot draw on these posts.
November 5, 2015

Math
It would help if you proofread your questions before you posted them. Does V earn > or < F? If >, then V = F + 2.25 If <, then V = F - 2.25 V + F = 14.55 Substitute F ± 2.25 for V in the last equation and solve for F. Insert that value into the first ...
November 5, 2015

Math
6 - 3 3/8 = 5 8/8 - 3 3/8 = 2 5/8 remaining Since the remaining portion is too small to wrap another present, you would need 3 pieces. However, if you combined two 2 5/8 pieces for one present, you would only need 2 pieces.
November 4, 2015

Marh
Yes, 1/12 of the total, whatever that is.
November 4, 2015

6th grade Math
It would help if you proofread your questions before you posted them. From your data, I have no idea how you got a negative number.
November 4, 2015

math
Something sounds "fishy" here. Three is included in "three or more." I would hope that the lower price is honored.
November 4, 2015

Science
Since this is not my area of expertise, I searched Google under the key words "natural and artificial selection comparison" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=natural+and+artificial+selection+comparison&ie=UTF-8&oe=UTF...
November 4, 2015

math
They only have four plays to get the ten yards for a first down. Are the -23 1/3 yards part of this same series of downs? If so, they need the 10 yards plus the 26 1/3 lost. You determine the equation.
November 4, 2015

Statistics
red/(red plus blue) = ?
November 4, 2015

Math
30 + .50x = T1 Substitute 52 for x and solve. Do a similar procedure for the other company.
November 4, 2015

math
If q = 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 for each Z scores distance from the mean. Add.
November 3, 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.
November 3, 2015

math
How is this math? TV news gives rapid presentation of short news bursts?
October 30, 2015

Science
The pH scale is a measure of the hydrogen ion concentration. It spans from 0 to 14 with the middle point (pH 7) being neutral (neither acidic or basic). Any pH number greater than 7 is considered a base and any pH number less than 7 is considered an acid.
October 30, 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.
October 30, 2015

Science
Give an example.
October 30, 2015

Statistics
No scores shown. a) What is "Sturges' formula"? b) 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. ...
October 30, 2015

Math
Correct except for 5.
October 29, 2015

biology
Cell membrane
October 29, 2015

science
What list?
October 29, 2015

Biology
Goggle each term.
October 29, 2015

Biology
What ideas?
October 29, 2015

social
Why are two choices identical?
October 29, 2015

math
L = 2W-7 L * W = 165 Substitute 2W-7 for L in the second equation and solve for W. Insert that value into the first equation to solve for L. Check by putting both values into the second equation.
October 29, 2015

Math
Pythagorean Theorem a^2 + b^2 = Hyp^2 16 + 25 ≠ 36 225 + 256 ≠ 625
October 29, 2015

math
30.6 - 30.6/3 = ?
October 29, 2015

Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for each Z score. Either-or probabilities are found by adding the individual probabilities.
October 29, 2015

Human Growth
A refers to monozygotic twins.
October 29, 2015

Statistics HELP!!
Try human heights and heights of a basketball team.
October 28, 2015

math
20.00 - 5.50 - 2.60 = ?
October 28, 2015

Math Can Someone explain me about this question
All you need to saw off is 2' 8" inches to make the board that long. However: 4 yards = 12' 11' 12" - 2' 8" = 9' 4"
October 28, 2015

statistics
Since this is not my area of expertise, I searched Google under the key words "difference between the coefficient of determination and residuals" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=difference+between+the+coefficient+of...
October 28, 2015

MATH help
Multiply both sides by 4. x - 20 = 24 Take it from here.
October 28, 2015

math
Subtract 12 from both sides, then multiply by -1.
October 28, 2015

Math
Yes, if you math is correct.
October 28, 2015

Science
A half plus a half = a whole A whole plus a whole gives you what?
October 28, 2015

Statistics
Either-or probabilities are found by adding the individual probabilities. Do that for failure rates, then subtract from 1.
October 28, 2015

11th grade math
When multiplying/dividing, exponents are added/subtracted respectively. y^(a-b)
October 28, 2015

11th grade math
When multiplying/dividing, exponents are added/subtracted respectively. y^a-b
October 28, 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 later post.
October 28, 2015

Pertunia msimango
It might help to ask this question of your high school/college counselor, who can ask the above and other questions and give you interest tests to help you determine possible avenues.
October 28, 2015

Math
√20 = 4.4721
October 28, 2015

MAth
1 and 4 are correct. 2. Add 8 to both sides. 3. Subtract 5 from both sides.
October 28, 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.
October 28, 2015

Behavioral Statistics 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.
October 28, 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.
October 27, 2015

Behavioral Statistics
I answered this previously. We need to get 25% of the obtained scores. You are assuming that the scores ranged close to 1-100. That is typically NOT the case. What if all the scores were above 75? Check with one of the tests taken in any of your classes. What would the range ...
October 27, 2015

math
Do you mean (√23)/3 or √(23/3)? Either way, these answers do not apply as you have them written. Typos?
October 27, 2015

Math
2 * 2 = 4 Can draw pictures on these posts.
October 27, 2015

Geometry
The other endpoint will be the same distance from the midpoint as the known endpoint.
October 27, 2015

Maths
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Cannot sketch on these posts. Also, do you have a typo in your equation?
October 27, 2015

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
October 27, 2015

algebra
Multiply both sides by 6/5 5/6x * 6/5 = 25 (6/5) x = 30
October 27, 2015

math
74 + 12(52) = ?
October 27, 2015

math
3(2+1) = 3 * 3 = ?
October 27, 2015

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