Thursday
November 27, 2014

# Posts by PsyDAG

Total # Posts: 18,731

Statistics and probability
Use the Chi-square (X^2) method. X^2 = ∑ (O-E)^2/E, where O = observed frequency and E = expected frequency. ∑ = sum of all the cells. E = (column total * row total)/grand total df = n - 1, where n = number of cells Look up value in X^2 table in the back of your ...
April 23, 2014

Algebra II
Anything times 1 or to the first power is itself. Unless you have typos, here is what I get: (2x)^3 + 12x^2 * (-5y) + 6x * 25y^2 - 125y^3 = 8x^3 - 60x^2y + 150xy^2 - 125y^3
April 23, 2014

Algebra II
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (12/15)^7 * (3/15)^3 = ?
April 23, 2014

math
I assume it is a right triangle. Area = 48 = 1/2 hb 96 = hb Set one variable as multiple of 2 and see if the same multiple of 3 will multiply to = 96. Pythagorean theorem: 8^2 + 12^2 = Hyp^2 64 + 144 = 208 = Hyp^2 √208 does not match any of your choices. 14 < √...
April 23, 2014

Stats.
What about the women that tested negative for cancer?
April 23, 2014

statistics (?)
No table. You cannot copy and paste here.
April 23, 2014

math
If c = "additional number off (sic) customers," then each teller will serve "c - 16 OVER 4" [more clearly written (c-16)/4] additional customers.
April 22, 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. See your later post.
April 22, 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. Quit using different names.
April 22, 2014

health
Since this is not my area of expertise, I searched Google under the key words "cardiac smooth muscle" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=cardiac+smooth+muscle&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
April 22, 2014

Science
April 22, 2014

genetics
1. Mate with an Ll. If about 25% offspring are short-winged, it is also Ll. If none, it is LL. 2. If dominant, only one gene is needed for the disorder. If mom is heterozygous, her chances are 50%, if homozygous, certainty. 3. Right. If both parents are only carriers for the ...
April 22, 2014

Algebra
60 - 60/3 - 60/4 = ?
April 22, 2014

Probability (?)
Five defects out of how many? What size sample?
April 22, 2014

statistics
95% = mean ± 1.96 SEm SEm = SD/√n 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 = ...
April 21, 2014

Math
If the scale does not continue to slide, 20 * 10 = ?
April 21, 2014

Math
L > 3s + 4
April 21, 2014

math
x/17.5 = 12/5 Solve for x.
April 21, 2014

math
Convert feet to inches, then divide. (11*12*14*12)/(4*4) = ?
April 21, 2014

statistics (?)
Lacking data.
April 21, 2014

geology
Since this is not my area of expertise, I searched Google under the key words "value of igneous rocks" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=value+of+igneous+rocks&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
April 21, 2014

math (?)
April 21, 2014

Evolution question - HELP!
Since this is not my area of expertise, I searched Google under the key words "Niles Eldredge change" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Niles+Eldredge+change&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
April 21, 2014

Biology
If you are talking about the undigested food, it is chyme. If you mean the valve, it is the pyloric valve. You could have checked your answer more quickly by Googling it.
April 21, 2014

Psychological and Psychophysiological Stress Disor
I don't know if they are all undiagnosable, but war, rape, earthquake, tornado, explosions, severe physical attack, kidnapping….
April 20, 2014

Ollu
How close will you be standing to the mirror?
April 20, 2014

statistics
Why are two of the scores 35? Typo? Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the percentiles related to the Z scores. T = 50 + 10Z
April 20, 2014

statistics
We cannot show frequency distribution here. Arrange score in order of value. The frequency of each score will determine its value on the ordinate (y-axis).
April 20, 2014

statistics
Since this is not my area of expertise, I searched Google under the key words "contribution of computer in the development of science and technology" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=contribution+of+computer+in+the+...
April 20, 2014

Math
What do the widget manufacturers want to know? Production levels of widgets? Standardization of widgets? Sales of widgets?
April 19, 2014

math
From the way you have your last equation written "square root 3 /2" Looks like √(3/2). It should be written (25√3)/2. The brackets make the meaning clearer. The square root sign (√) can be obtained by using "v" and "alt/option" ...
April 19, 2014

math
Use Pythagorean theorem to find other leg. h^2 + b^2 = Hypotenuse^2 h^2 + (5√3)^2 = 100 Solve for h. Area = 1/2 hb Insert values and solve for area.
April 19, 2014

math
-4x-4y=12 Mutliply by 4. -16x - 16y = 48 Second equation: 16y=-16x-48 Transpose. 16x + 16y = -48 Multiply by -1. -16x - 16y = 48 What does that tell you?
April 19, 2014

maths
x = included, y = bring own y = 30 - x 5x + 3y = 110 Substitute 30-x for y in second equation and solve for x. Insert that value into the first equation and solve for y. Check by inserting both values into the second equation.
April 19, 2014

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.
April 19, 2014

statistics
Ho: µ = sample mean
April 18, 2014

statistics
Z = (score-mean)/SD Insert the known values and solve for the unknown.
April 18, 2014

Psychology
interaction?
April 18, 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.
April 18, 2014

sociology
I would tend to go with "not falsifiable." This theory is NOT "based on empiricism," since "she is unable to produce an individual with above chance predictions."
April 18, 2014

Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.05) = Z = 1.645 90% = mean ± 1.645 SEm SEm = SD/√n
April 18, 2014

Science
In the chromosomes of the egg and sperm.
April 18, 2014

Algebra
Divide both numerator and denominator by 2.
April 18, 2014

Stats
95% = mean ± 1.96 SEm SEm = SD/√n
April 18, 2014

statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. both even number = 3/6 * 3/6 = ? both odd = same different = 1/6 * 5/6 = ?
April 18, 2014

statistics (?)
What follows? You cannot copy and paste here.
April 18, 2014

Statistics
April 18, 2014

Stats
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of Z = -1.77. Is the probability in the smaller area < .05?
April 17, 2014

biology 3
April 17, 2014

science
Since this is not my area of expertise, I searched Google under the key words "when the first vertebrates evolved" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=when+the+first+vertebrates+evolved&ie=UTF-8&oe=UTF-8 In the future, ...
April 17, 2014

Math
right
April 17, 2014

Psychology
https://www.google.com/search?client=safari&rls=en&q=Psychological+theories+of+behavior&ie=UTF-8&oe=UTF-8 After reviewing the various models/theories, you have to decide which you think is most effective.
April 17, 2014

psy/310
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.
April 16, 2014

genetics
Since this is not my area of expertise, I searched Google under the key words "color dominance in pea plants" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=color+dominance+in+pea+plants&ie=UTF-8&oe=UTF-8 In the future, you can ...
April 16, 2014

BIOLOGY 12
April 16, 2014

statistics
11, 12. A statistic is a measure on a sample, while a parameter is a measure on a population. 13. SEm = SD/√n = SEm = 12/√75 = ? 14, 15. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the ...
April 16, 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 previous post.
April 16, 2014

genetics
Since sister is ww, must have received w from each parent. Both parents would be Ww or one Ww and the other ww.. Try a punnett square. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8
April 16, 2014

Statistics
Their admission of speeding. 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.
April 16, 2014

psychology
Growth in height vs. weight, golf score vs. financial winnings (negative), education level vs. later earnings, distance from viewer vs. apparent image size (negative), the height from the floor of two ends of a rope strung over a suspended pulley (negative), etc…..
April 16, 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. Find table in the back of your statistics text labeled something like "...
April 16, 2014

statistics
0 0.05 1 0.10 2 0.15 3 0.35 4 0.20 5 0.10 6 0.05
April 16, 2014

statistics
A statistic is a measure on a sample, while a parameter is a measure on the whole population.
April 16, 2014

statistics
SEm = SD/√n 10 = ± Z (SEm) 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.
April 15, 2014

algebra
Right!
April 15, 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. A statistic is a measure on a sample, while a parameter is a measure on a ...
April 15, 2014

statistics
Z = (score-mean)/SD Fill in the known values and solve for the unknown.
April 15, 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.
April 15, 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.
April 15, 2014

Algebra II
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (12/15)^7 * (3/15)^3 = ?
April 15, 2014

None given. You cannot copy and paste here.
April 15, 2014

Math
7xy + 4xy + x + y - 27 = 11xy + x + y - 27
April 15, 2014

Statistics
Look up the Z score on that table. You are looking for probability of Z score less than (<) -1.45. You could also try: http://davidmlane.com/hyperstat/z_table.html
April 15, 2014

Statistics
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.
April 15, 2014

statistic
Find the means 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 = (mean1 - mean2)/...
April 15, 2014

statistic
Graph it out to see what type of distribution you get.
April 15, 2014

statistics
99% = mean ± 2.575 SEm SEm = SD/√n "mean for this group" = sample mean
April 15, 2014

Elementary Algebra
28 + .22m = 29 + .17m Solve for m.
April 15, 2014

science
Friction
April 15, 2014

statistics
90% confidence interval leaves .05 on each side. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.05) and its Z score. 90% = mean ± 1.645 SEm SEm = SD/√n
April 15, 2014

Psy
What aspects of the environment are you considering?
April 15, 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.
April 14, 2014

statistics
A negative Z score does not necessarily indicate anemia. It would have to be significantly low, P < .05, Z < -1.96, to be considered anemic.
April 14, 2014

math
First of all, the range is not a measure of central tendency. The mean acts as a fulcrum (balance point) for the distribution, therefore outliers on one side will draw the mean out to that side. In other words, the distribution is significantly skewed. In a skewed distribution...
April 14, 2014

Math (?)
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Without more specifics, we don't understand either. What is your question?
April 14, 2014

statistics
a. Z = (score-mean)/SEm SEm = SD/√n Solve Z for scores of 502±10. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between mean and Z scores. b and c. Use similar ...
April 14, 2014

First of all, you need to specifically define what you mean by "fruit and vegetables" and what constitutes a "serving." For example, does apple/orange/grape Juice qualify? If so, how much drink qualifies as a serving? How many grapes make up a serving? Once...
April 14, 2014

statistics (?)
Insufficient data.
April 14, 2014

statistics
If you math is correct, I agree.
April 14, 2014

April 14, 2014

math
No alternatives given. Cannot copy and paste here. 99% = mean ± 2.575 SEm SEm = SD/√n You do the math.
April 14, 2014

Psy270
What behavior changes were noted? Was Clara happy about going to preschool previously? Did a specific traumatic event occur at the school? Depending on the answers to these questions, they may lead to determining other questions.
April 13, 2014

Psy270
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. Please only post your questions once. Repeating posts will not get a quicker response. In ...
April 13, 2014

math
Section 1 can be either 36 or 49 sq. ft. Choose one and then work for Section 2. We cannot put a grid on this post.
April 13, 2014

Math help
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. http://www.mathsisfun.com/data/correlation.html
April 13, 2014

math
April 13, 2014

Science
I thought I answered this before. Plant cells are different from animal cells. Since this is not my area of expertise, I searched Google under the key words "Plant animal cell parts" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=...
April 13, 2014

SCI 207
You cannot copy and paste here.
April 13, 2014

Pages: <<Prev | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | Next>>

Search
Members