Thursday
December 18, 2014

Posts by PsyDAG


Total # Posts: 18,863

statistics
What is your question?
September 14, 2014

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.
September 14, 2014

Algebra
Yes
September 14, 2014

Elementry Statistics
Z = (score-mean)/SEm SEm = SD/√n (How large was the sample?) 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?
September 14, 2014

statistics
(70 + 50)/2 = ?
September 14, 2014

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (1/52)^12 = ?
September 14, 2014

statistics
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.
September 14, 2014

8th grade homework
Square r. 66 = 1/3(3.14) 9 h Combine terms. 66 = 3 * 3.14h = 9.42h Divide both sides by 9.42. 7 = h
September 14, 2014

math
Right.
September 14, 2014

Math
First answer right. What is value of e? 1,000,000? Even so, what happened to the 7?
September 14, 2014

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. [(365-31)/365]^31 = ?
September 14, 2014

Math!
1) 19 + 5 (16) + 3(16) = 19 + 80 + 48 = 147 (agree) 2) y^3 + 3xy^2 + 2x +13 10x -8x = 2x 3) Right
September 14, 2014

Statistics
To equal 1, both numerator and denominator need to be the same value. Cannot do Venn diagram here.
September 14, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "photosynthesis and respiration" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=photosynthesis+and+respiration&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the ...
September 14, 2014

Stat
Z = (score-mean)/SD Insert the values to calculate Z.
September 14, 2014

Stat
In a skewed distribution, the median is the most central of the measures of central tendency.
September 14, 2014

statistics; emergency please help me
Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n If only one SEm is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled something like "...
September 13, 2014

Science
Sorry that I didn't respond to your answers. a. What is the independent variable? New drug treatment RIGHT b. What is the dependent variable? Fewer AIDS-related illnesses NOT JUST "FEWER" c. What control treatment should be used? The same amount of the drug ...
September 13, 2014

Science
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable. A dependent variable is the response or measure of results. Extraneous variables — other than the independent ...
September 13, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "spectral broadening" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=spectral+broadening&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
September 13, 2014

Algebra
2x -21 = 2x - 21 agree
September 13, 2014

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 = (score-mean)/SD Find ...
September 12, 2014

Statistics First Q
Z = -1 to Z = +1
September 12, 2014

Algebra 3-4
First Stage = x + 28, second = x x + 28 + x = 152 Solve for x, then x + 28.
September 12, 2014

Statistics
I'm not sure what CCIW means, but if it involves college freshmen, then I would agree.
September 12, 2014

Statistics
1, 2. Agree
September 12, 2014

math
What table?
September 12, 2014

Math
5/4.5 = 10/9 = x/60 Solve for x.
September 12, 2014

Science
1a. Correct 1b. Although you may be right, your data has no indication that different varieties of bean plants are being used. 2a. Right. 2b. wavelengths
September 11, 2014

Poll
Had rooms laminated, but were two boxes short while laminate was being installed. Had to look for matching laminates.
September 11, 2014

statistics
The greater your confidence level, the smaller your alpha level.
September 11, 2014

science
You are missing the value for L. 4.0 * 4.5 * L = V
September 11, 2014

math
What is your question?
September 11, 2014

math
659 is the number, but not how many blocks there are.
September 11, 2014

Statistics
Agree.
September 11, 2014

Statistics
1. Single blind gives the control group a placebo — a substance that is inert, it has no physical effect. Subjects don't know if they are in experimental or control group to reduce placebo effect, a change in behavior solely due to believing that you are getting the ...
September 11, 2014

Statistics
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable. A dependent variable is the response or measure of results. Extraneous variables — other than the independent ...
September 11, 2014

statistics
A. 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. B. Find table in the back of your statistics text labeled something like "...
September 11, 2014

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 give you a start. Find the mean first = sum of scores/number of scores ...
September 11, 2014

statistics
You are assuming that we are familiar with your acronyms. What are "tobt" and "tvc"?
September 11, 2014

science
overt aspects, explicit aspects, evident aspects?
September 10, 2014

algebra
L = 2W -3 2L + 2W = 144 Substitute 2W-3 for L and solve for W, then L.
September 10, 2014

algebra
Let x = short side, then 3x = each other side. x + 3x + 3x = 56 Solve for x, then 3x.
September 10, 2014

biology
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable. A dependent variable is the response or measure of results. Extraneous variables — other than the independent ...
September 10, 2014

Math
27 = 3 * 3 * 3 36 = 3 * 3 * 4 Now what do you do?
September 10, 2014

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.
September 10, 2014

math 12
It would help if you proofread your questions before you posted them. Very difficult to read.
September 10, 2014

Math
Fourteen point one minus w Z divided by 8, then minus 9
September 10, 2014

Math
√29 = 5.3852 5 2/3 = 5.67 5.67 > 5.3852
September 10, 2014

statistics
I'm not sure what you mean by "answers assertively." Number of individuals answering yes. 10 * 100 * .5 = ?
September 10, 2014

algebra
5D = Q D + 6 = N .05N + .10D + .25Q = 5.30 Substitute terms. .5(D+6) + .10D + .25(5D) = 5.30 Solve for D, then N and Q.
September 9, 2014

Algebra
What would lead to a product of -3? (1,-3 or -1,3) From the two end terms, what would add to -2? Since the first term has to be 1, the last term has to be -3 to = -2. Include the a and b terms. I hope this helps.
September 9, 2014

living environment
1) Right 2) Remember that some of the products are not necessarily drinkable, e.g., soap, oil.
September 9, 2014

Algebra I
10x - x^2 = 3x - 10 50 - 25 ≠ 15 - 10 You are right.
September 9, 2014

Science!
No, how does the oven gauge what level of heat to release?
September 9, 2014

5th grade math
What product? If a decimal, delete all the zeros after the last real number, e.g., 56.17000 = 56.17.
September 9, 2014

math
Have the vertical axis (ordinate) represent frequency and the horizontal axis (abscissa) represent score values. Find the range of marks, arrange score values from low on left to high on right. Depending on the number of students, your might want to group the values into ...
September 9, 2014

Math
100 = 10^2 Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 5.97 * 10^23 * 10^2 = 5.97 * 10^25
September 9, 2014

Math
When divided by 5, to get a remainder of 4, the ones number must be either 4 or 9. Four is eliminated, because it is not odd. To sum to 10, the first number must be 1 --> 19.
September 9, 2014

Math
No. y + 2y = ?
September 9, 2014

Math
No, what happened to the w?
September 9, 2014

Urgent Spanish Check

September 9, 2014

math
Nothing shown.
September 9, 2014

algebra
A = 2S 2.25A + 1.75S = 1150 Substitute 2S for A and solve for S, then A.
September 9, 2014

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 calculated.
September 9, 2014

math
Are you talking about the median? https://www.google.com/search?client=safari&rls=en&q=calculating+median&ie=UTF-8&oe=UTF-8&gws_rd=ssl
September 9, 2014

Statstics
Median = 50th percentile
September 9, 2014

stats
What is your Question? SD = √variance
September 9, 2014

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (for two-tailed, .05 and .01) and get the respective Z scores. 90% = Mean ± Z(SD) 98% = mean ± Z(SD) ...
September 8, 2014

Statistics
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. https://www.google.com/search?client=safari&rls=en&q=calculating+median&ie=UTF-8&oe=UTF-8&gws_rd=ssl#rls=en&q=calculating+correlation+...
September 8, 2014

statistics
It would help if you proofread your questions before you posted them. Does your "f" key not work well?
September 8, 2014

algebra
The memory used for a photo is variable. Also you don't indicate the total memory.
September 8, 2014

Algebra
Combine common terms. 2x^2 + 5x = 0 Factor. x(x+5) = 0 You should be able to take it from here. Check by inserting values found into the original equation.
September 8, 2014

Biology please help!
CO2 in the blood is the controlling factor for breathing rate.
September 8, 2014

Biology
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.
September 8, 2014

math
5 * 10^-5 liter
September 8, 2014

math
Assuming the $15 is a one-time charge for the wet suit… 25h = 20h + 15 Solve for h.
September 8, 2014

Math
It depends on the distance. For a long distance, like Greyhound, the number of seats. For a shorter distance, like a intracity bus, the number of seats plus the room for standing.
September 8, 2014

please check see if im correct
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 just that to determine SEdiff. If you are using level of significance of P < .05, Z > 1.96.
September 8, 2014

Biology - very urgent
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 last post.
September 8, 2014

Math
What second column?
September 8, 2014

Biology
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.
September 8, 2014

statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 81/(729+81) * 350/(350+350) = ?
September 8, 2014

geometry
If they are labeled identically, wouldn't they be measuring the same thing? I would assume that they are not perpendicular, but identical. However, assuming a labeling typo, I would agree.
September 8, 2014

SS
Yes, but you might want to express it in distance units rather than time.
September 8, 2014

Biology
Welcome
September 8, 2014

Biology
Since you inhale oxygen and exhale carbon dioxide, I would agree with you.
September 8, 2014

math
11(1 - .03) = ?
September 8, 2014

Science
Doesn't that depend on your definition of "more"? In the desert, it probably would. However, once the plant becomes saturated, I don't think so.
September 8, 2014

Speech
Welcome
September 8, 2014

Speech
Title: Right to Life If your mothers were pro-abortion, how many of you would not be here? Even if you don't use these, they might help you to think of your own.
September 8, 2014

Speech
What is the purpose of your speech? Are you just providing information, or are you advocating a pro or con position?
September 8, 2014

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 1) 7.34 * 10^-8 2) I assume the dashes in front of your choices are not meant to be negative signs. 10^-3 = .001 10^-4 = .0001 10^-5 = .00001 That should help you to ...
September 8, 2014

speech
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. My response to your later post still applies.
September 8, 2014

math
.6 * $18 = ? (Where is this clothing store? I would love to go to that sale.)
September 8, 2014

Statistics
68% is between Z of 1 and -1. Insert values of Z and solve for the scores. Z = (score-mean)/SD
September 8, 2014

statistics
Do you have a random number table? Start at any point and use applicable three digit numbers.
September 8, 2014

math
We would have to know the decimal first. For example, .5 = "point five" or "one half"
September 7, 2014

pseudocode
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.
September 7, 2014

biology
You would want to say that there is no control group — one which receives neither extra water nor extra fertilizer. You can have more than one independent variable. An independent variable is the potential stimulus or cause, usually directly manipulated by the ...
September 7, 2014

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