Tuesday
September 23, 2014

Posts by PsyDAG


Total # Posts: 18,275

statistics
A parameter is data about the whole population, while a statistic deals with a part of the population, a sample. What does that tell you?
November 26, 2013

Biology
It's possible, but what type of genes are going to be inserted? Who will determine who will get what genes? As with medicine, will there be unintended side effects? That should give you a start.
November 26, 2013

communicate
This is asking for your response to an unknown artifact. Our psychic abilities are limited or nonexistent.
November 25, 2013

statistics psy/315
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. Find table in the back of your statistics text labeled something like "...
November 25, 2013

math (?)
No information above. Original price of chair missing.
November 25, 2013

math (?)
Data missing. A parameter is a measure on the total population, while a statistic is a measure on a portion of the population.
November 24, 2013

statistics
A normal distribution approximates a bell-shaped curve. Outliers to one side would skew the distribution. If the distribution was flat, having about the same frequencies throughout the distribution, this would be non-normal. Also a bimodal distribution would be non-normal, ...
November 24, 2013

Statistics
% = mean ± Z(SEm) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (%/2) from the mean and its Z score. Substitute values into above equation and calculate. If you ...
November 24, 2013

statistics
right.
November 24, 2013

math (?)
What is your question?
November 24, 2013

pre-algebra (?)
What model?
November 24, 2013

science
Since this is not my area of expertise, I searched Google under the key words "Lamarck vs. Darwin differences" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=lamarck+vs+darwin+differences&ie=UTF-8&oe=UTF-8 In the future, you can ...
November 24, 2013

statistics (?)
What following? 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. This may help you decide.
November 24, 2013

Math
I am assuming the Eric is ON the train. 24/3 = 8 ft./sec. 8 + 80 = ?
November 23, 2013

Science
I would assume so. 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.
November 23, 2013

algebra 2
Except for multiplying/dividing by a negative number, treat just like an equation. First get rid of the parentheses by multiplying. 2x - 10 > 6x -18 Subtract 2x from both sides and add 18 to both sides. You should be able to work it from there.
November 23, 2013

medical needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
November 22, 2013

statistics
Cannot sketch on these posts. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores.
November 22, 2013

science
What type of mutations are you referring to? Dominant? Recessive? Other?
November 22, 2013

science
1. B 2. B
November 22, 2013

statistics (?)
Where is your data?
November 21, 2013

math (?)
Powers not shown.
November 21, 2013

Statistics
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. Find table in the back of your statistics text labeled something like "...
November 21, 2013

Statistics
Right
November 21, 2013

College Algebra (?)
What line? Graphics cannot be posted.
November 21, 2013

stastistics
Null hypotheses propose no effect.
November 21, 2013

College Algebra
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 21, 2013

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. I answered this before. Carriers have the recessive gene in their genotype, ...
November 21, 2013

Statistics
% = 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 ([1-%]/2) to find the Z score. Insert that into ? position. Example: 95% = 74.8 &...
November 21, 2013

Statistics
% = mean ± ? SEm Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-%]/2) and its Z score. Enter Z score for ?. Solve for intervals.
November 21, 2013

Statistics
A null hypothesis expects no difference.
November 21, 2013

Algebra 1
72 + 4(12-6) = ?
November 20, 2013

biology
Since this is not my area of expertise, I searched Google under the key words "atom structure picture" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=atom+structure+picture&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
November 20, 2013

math(check answers please)
1. B 2. A 3. 3f + 2f = 5f
November 20, 2013

Math
1, 2. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3. 8 lots total. With each selection, there is one less large lot and one less total. 6/8 * 5/7 * 4/6 = ? 4. 6/15 * 5/14 = ?
November 20, 2013

Psy/355
I searched Google under the key words "motivation" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=motivation&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more quickly, if you use appropriate key words ...
November 20, 2013

Statistics
The smallest is most significant.
November 20, 2013

physical (?)
What statements?
November 20, 2013

Math/Science
(58.7 * 10^16)/(9.3 * 10^4) = ? seconds To convert to hours, multiply by 360. For days, multiply again by 24. For years, multiply again by 365. for centuries, multiply again by 100.
November 19, 2013

science
Not sure what this statement means. The light from the sun gets stronger at sunrise and weaker at sunset, but the radiation from the sun is about the same under both conditions.
November 19, 2013

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.
November 19, 2013

Statistics
Ho: Smpking does not effect the period of gestation. Generalize from the above to other null hypotheses.
November 19, 2013

math (?)
What are your choices?
November 18, 2013

Science
To carry the disease means that it is in the genotype but not the phenotype. That would happen with a recessive gene. It will occur.
November 18, 2013

Math (?)
We cannot view graphs on these posts.
November 18, 2013

Math
Please, where is the specific question?
November 18, 2013

math
5 + 4.75 + 2.25 = ? Convert to feet and inches.
November 18, 2013

algebra
Subtract 3x from both sides, then divide both sides by 6.
November 18, 2013

math
1.483.56 has 6 significant figures.
November 18, 2013

algebra
A square has all sides of equal length. You do not have a square. For a rectangle, 2[(4x+3)+3(2x - 5)] = ?
November 18, 2013

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 18, 2013

math
$14,260/24 = $594.17 19.63/594.17 = ?
November 18, 2013

statistics (?)
What is your question?
November 18, 2013

Math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. How did you get zero? In all = 9 * 3 = ? Twice = 2 times 9 * 2 = 18
November 18, 2013

Math
Right. See later post for second problem. 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.
November 18, 2013

Math
All correct except 3. Each basket in basketball counts as two points. Also, online “*” is used to indicate multiplication to avoid confusion with “x” as an unknown.
November 18, 2013

statistica
Conclude H1 at the 5% level of significance, since it is a one-tailed test and it is well beyond the 90% confidence limits.
November 17, 2013

stats
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
November 17, 2013

Statistics
a, b. No inferences being made. c. There is no data for other nights, so this is an inference.
November 16, 2013

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.
November 16, 2013

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 16, 2013

science10
To get help, you need to post specific questions.
November 16, 2013

Statistics
Proportion = # in category/total number
November 16, 2013

Statistics
When you have specific data, it is descriptive. When you go outside the actual data, it is inferential. 1. a, b and c infer. 2. a describes, b and c infer.
November 14, 2013

Math Statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores. Reverse process with last question, starting with .90.
November 14, 2013

science
coitus, genes, traits?
November 13, 2013

science
Was the girl cloned? Otherwise it is not exact.
November 13, 2013

maths
100 cm = 1 m 60/100 = ?
November 13, 2013

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-.87]/2) and its Z score. 87% = mean ± Z(SD) Fill in the values and calculate.
November 13, 2013

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-.99]/2) and its Z score. 99% = mean ± Z(SEm) SEm = SD/√n
November 13, 2013

Math
Area = 1/2 height*base Assuming that the above are height and base, 170 * 800 = 136,00 sq. feet 1 acre - 43,560 sq. feet 136,000/43,560 = ?
November 12, 2013

math
a. 5.24 * 2 = ? billion b. 5.24 * 4 = ? c. 5.24 * 8 = ?
November 12, 2013

Statistics
http://www.chegg.com/homework-help/definitions/type-i-and-type-ii-errors-31
November 11, 2013

Statistics
See Previous post.
November 11, 2013

Statistics (Ooops)
Excuse me. Is .05 > P > .01? Again, we don’t know.
November 11, 2013

Statistics
C. Is the .05 > Alpha > .01? We don’t know.
November 11, 2013

math (?)
I don’t know how you define “1 block.” Jane’s amount factors into 15 * 5, therefore Peter would factor to 15 * 2 = 30. Is that what you mean by “1 block”?
November 11, 2013

Math (?)
Each person received 7/4 pounds. 2(7/4) were given to food pantry. It would help if you proofread your questions before you posted them. You seem to be missing a unit designation for the apple sauce. 1 2/3 what?
November 10, 2013

HR (?)
What Human Relations function did you choose?
November 10, 2013

math
Find the mean first = sum of scores/number of scores. Range = highest score - lowest score. 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 ...
November 10, 2013

Science
I would agree with D.
November 10, 2013

statistics
P is less than OR equal (≤) .01, which leads me to believe that taking aspirin reduces mortality.
November 9, 2013

Biology
Since this is not my area of expertise, I searched Google under the key words "proton pump input output" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=proton+pump+input+output&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
November 9, 2013

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. Do you consider it appropriate? b) It would help if you proofread your questions ...
November 9, 2013

statistics
Percent = mean ± ? SEm Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to one-half of the desired percentages to find the Z score and its distance from the ...
November 9, 2013

Statistics
99% = mean ± 2.575 SEm SEm = SD/√n
November 9, 2013

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 your Z score.
November 9, 2013

Statistics
95% = mean ± 1.96 SEm SEm = SD/√n
November 9, 2013

Statistics
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. Find table in the back of your statistics text labeled something like "...
November 9, 2013

science
As the distance increases, the gravitational forces between the two objects decreases. It is an inverse relationship. This means the statement is true.
November 8, 2013

Math (Ooops)
Sorry, I goofed. Mia Culpa!
November 8, 2013

Math
Steve seems to be ignoring that you might pick 4 socks of the same color in a row.
November 8, 2013

Math
First the choice of one color = 4/8. With the 7 remaining socks, the choice of the other color = 4/7. With 3 remaining of each color in the 6 socks left, P = 3/6. If the events are independent, the probability of both/all events occurring is determined by multiplying the ...
November 8, 2013

science
Since the sound has to travel in both directions: 340 * 5.2/2 = ?
November 7, 2013

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.
November 7, 2013

MATH
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. a) (1-.05)(1-.21) = ? b) .05(1-.21) = ? c) Follow same process. d) This is saying that either h or k will qualify. Either-or ...
November 7, 2013

Math
From your set of numbers, there is no mode or modal class. If the scores were grouped into intervals, one could be the modal class. The mean or median would be better to indicate average class sizes. Any of the measures of central tendency can be used, if the distribution is ...
November 7, 2013

spanish (Ooops!)
I'm sorry that I misinterpreted, since in los Estados Unidos, we us the period to indicate less that one. What you want is: quinientos treinta miles
November 6, 2013

spanish
quinientas treinta
November 6, 2013

statistic (?)
What is your question?
November 6, 2013

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