Wednesday
June 29, 2016

Posts by PsyDAG

Total # Posts: 22,022

Maths
With range = 8 one of the missing numbers is 5 or 14. Mean = ∑x/n (5+6+11+9+7+8+13+x)/8 = 9 Solve for x. If necessary, try with 14.
December 6, 2015

Biology
Since this is not my area of expertise, I searched Google under the key words "reproductive cycle of pines" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=reproductive+cycle+of+pines&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you...
December 6, 2015

Science
Total mass/ mass of one bag = number of bags
December 6, 2015

math
What is your question?
December 5, 2015

statistics
Ho: mean = 1400 Ha: mean < 1400 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.
December 5, 2015

stat
90% = mean ± Z (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 (p = ±.05) and its Z score. Insert data into first equation.
December 5, 2015

Biology
D, D, C
December 5, 2015

Math please helppp
No Polygon A. Cannot copy and paste here.
December 4, 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.
December 4, 2015

Opinion Question
In many cases, technology allows us to exceed our limitations. Our strength is being able to develop the technologies.
December 4, 2015

math 210 fundamentals of geometry
No table. You cannot copy and paste here. Also, what is your question?
December 4, 2015

math
x + (x+44) = 180º Solve for x, then x +44.
December 4, 2015

Algebra 1
No Scatterplot. You cannot copy and paste here.
December 3, 2015

Math HELP!
It would help if you proofread your questions before you posted them. Incomplete. f(t) = ?
December 3, 2015

sampling distributions & parameter estimation
Expected mean = 50 SEm = SD/√n
December 3, 2015

Language art 7th grade
Look them up in a dictionary. If you don't have a hard copy, try http://www.learnersdictionary.com/definition/
December 3, 2015

statistics
15 * 2 = 30
December 3, 2015

science
https://www.google.com/search?client=safari&rls=en&q=velocity+calculation&ie=UTF-8&oe=UTF-8&gws_rd=ssl
December 2, 2015

Mathematics
Mean = ∑x/n (.87 + .89 + .91 + .85 + 2x)/6 = .9 Solve for x.
December 2, 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.
December 1, 2015

science
Last one, Meiosis II
December 1, 2015

Algebra 1
When multiplying/dividing, exponents are added/subtracted respectively. (-x^3)(-x^1) = -x^4 = x^4 since minus times minus = positive
December 1, 2015

Pre algebra
50 - x < 39
December 1, 2015

Math
Combine terms. The x^2 terms cancel out. -2x-3 = -x-3 -x = 0 Do you have typos?
December 1, 2015

Math
See previous post. Multiply proportion found by 60.
December 1, 2015

Math
See previous post.
December 1, 2015

Math
Z = (score-mean)/SD Use the table.
December 1, 2015

satistics
Z = (score-mean)/SEm Score = 450/6 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.
December 1, 2015

Algebra 1- A few questions, please help
No table. You cannot copy and past here.
December 1, 2015

Science
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own Google search. Also see http://hanlib.sou.edu/searchtools/. Full Definition of CRATER. 1. a : the bowl-shaped depression around the orifice of a volcano. b : a ...
December 1, 2015

Algebra
a. When multiplying/dividing, exponents are added/subtracted respectively. b .4 c. 64x^6 d. When multiplying/dividing, exponents are added/subtracted respectively.
December 1, 2015

math
A) 1 foot = .3048 m (5.4*.3048)/810 = ? B) (5.4*12)/.4 = ?
December 1, 2015

math
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.
November 30, 2015

math
Use same name. 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 30, 2015

math
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 Z scores. Multiply by 100.
November 30, 2015

science
System (without "eliminate")
November 30, 2015

algebraic expression
Right.
November 30, 2015

Maths
Mode is most frequently observed score. Mean = ∑x/n = (0*4) + (1*8)… /20 = ?
November 30, 2015

Science plz help
If you do not have these resources available to you, Google them.
November 30, 2015

math
Cannot make tables on this post. 5 * 6 = ?
November 29, 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 29, 2015

Statistic
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 (.15) and its Z score. Insert Z value into above equation and solve for score.
November 28, 2015

Science
Since this is not my area of expertise, I searched Google under the key words "earth tilt and sunlight" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=earth+tilt+and+sunlight&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can ...
November 28, 2015

Science
What squares and outline?
November 28, 2015

math
If P(3,6,8) means 3 or 6 or 8, then either-or probabilities are found by adding the individual probabilities (1/9). If P(3,6,8) mean 3 then 6 and then 8, if the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities ...
November 28, 2015

math
First, please do not use all capitals. Online it is like SHOUTING. Not only is it rude, but it is harder to understand. Thank you. You are talking about one side out of six.
November 28, 2015

Math
(990 - 900)/900 = ?
November 28, 2015

algebra (check answers)
1. 2(x+5) + 2(2x-1) = 2x+10 + 4X -2 = ? 2. First one right. 6x-8 - 2x + 5 = ? 3. Right
November 28, 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 27, 2015

Science
An experiment needs a control group.
November 27, 2015

maths
1. 1.01 * 50 = ? 2. 2L + 2W = Perimeter 3. 40 + 12(20) = ? Compare to 250.
November 26, 2015

math
2L + 2W = perimeter What is the width?
November 26, 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.
November 26, 2015

statistics(business)
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 26, 2015

science
Revolution of what?
November 26, 2015

Statiatics
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. I'll help on the last one. 5/(5+4+3) = ?
November 25, 2015

Math (?)
How can a car go 50 mph in zero hours?
November 25, 2015

HEALTH PLEASE 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. Resubmit with your answers.
November 25, 2015

Science
Because we don't know what an "átomo" is?
November 25, 2015

Ciencias
Trato contestar en Inglés. Antibiotic use can promote development of antibiotic-resistant bacteria. Every time a person takes antibiotics, sensitive bacteria are killed, but resistant germs may be left to grow and multiply. Repeated and improper uses of antibiotics are ...
November 25, 2015

Ciencias
Es mejor a preguntar en Inglés. No sé "estafiilococo."
November 24, 2015

math
Because the sum of the first column > 9.
November 24, 2015

Math
J - 6 = 4(F-6) = 4F -24 Therefore J = 4F - 18 J + 4 = 2F Substitute 4F-18 for J in the third equation and solve for F. Insert that value into the second equation to solve for J. Check by putting both values into the third equation.
November 24, 2015

math
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 ...
November 23, 2015

Math
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Cannot post diagrams here.
November 23, 2015

Algebra 2
No data. Models of what? How long does it take to produce one model? What are the costs of producing one model?
November 23, 2015

Science
The moon is smaller than the earth, so its gravitational pull is less.
November 23, 2015

psychology
Sensory adaptation is becoming less sensitive to a stimulus after sensing it continuously for a period of time. Let me give you a real life example — mine. Decades ago, I worked in an old home with several buildings. Even though they tried to keep the buildings clean, the...
November 23, 2015

math
(8/3)/8 = x/11 (8/3)/8 = x/6 Solve for x.
November 23, 2015

math
What is your question? 40/7?
November 23, 2015

math
How many shrubs?
November 23, 2015

Math
12.5 * (1-.75) = blue 32/3 * (1-.8) = white Add blue and white.
November 23, 2015

Math
3.25/1 = x/2.75 Solve for x.
November 23, 2015

MATH
25.5 * 82 = ?
November 23, 2015

Math
20 - 6.5 - 29/8 = ?
November 23, 2015

MATH
44 * 3/4 = number Already have the fraction in the information.
November 23, 2015

math
No values given.
November 23, 2015

Pre-Algebra (Partial)
Too many to respond to. However, first 5 are correct.
November 22, 2015

algebra
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. L = 5W LW = 80 Substitute 5W 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.
November 22, 2015

math 5th grade
No, you are making it too hard. The problem (as you indicated it) does not indicate that you have to convert it to ounces. 2 - 2/5 - 3/10 = 2 - .4 - .3 = 1.3 pounds
November 21, 2015

Pure Math
https://www.google.com/search?client=safari&rls=en&q=stem+and+leaf+plots&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=_SlSVuqTN-SD8Qedr4LADg
November 21, 2015

Pure Math
See later post.
November 21, 2015

Math word problem
Right!
November 21, 2015

Math
Was the "percent of fat calories that a person in America consumes each day" determined by this sample? If so, this sample is too small to generalize to the population. If not, I would assume that the data was found with a larger sample and apply the normal ...
November 20, 2015

science
What are your choices? Habit?
November 20, 2015

Statistics
Unclear. Typo? Z = .12/2 = .06? Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.06) and its Z score.
November 20, 2015

Chemistry?
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?
November 20, 2015

Behavioral Statistics Help!
How would you respond, if a bonus was taken away? Using "the same subjects tested in both situations" would lead this to happen.
November 20, 2015

Statistics
In the patient's mind, the placebo reduces anxiety (and therefore some of the stress). This reduction can decrease the perceived pain. http://drdavespsychologypage.homestead.com/Placebo_Power.pdf http://drdavespsychologypage.homestead.com/Placebo_Power_Doubled.pdf
November 20, 2015

algebra
https://www.google.com/search?client=safari&rls=en&q=cumulative+frequency+table&ie=UTF-8&oe=UTF-8&gws_rd=ssl
November 19, 2015

Math
A square has all sides equal.
November 19, 2015

math
Distance = rate times time 10 = 65t 10 = 50t Solve for t, convert to minutes and compare.
November 19, 2015

Stats
No table. You cannot copy and paste here.
November 19, 2015

math
What is the "same" exchange rate?
November 19, 2015

Science
Since this is not my area of expertise, I searched Google under the key words "evolution evidence" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=evolution+evidence&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=6WJPVqyVB-aD8QfPwbWgDA In the ...
November 19, 2015

science
Density = mass/volume
November 19, 2015

Statistics
A) small sample. What experiment? B) If that is the first quartile, then 25% would consume 34.31 fat calories or less. Consumption ≤ 34.51
November 19, 2015

Algebra
When multiplying, exponents are added. 1. x^2/9 2. 16a^4/c^8
November 19, 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 19, 2015

scale factors
3.5/1 = x/20 Solve for x.
November 19, 2015

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