Monday
July 28, 2014

Posts by PsyDAG


Total # Posts: 17,984

statistics
Inadequate data. 95% = mean ± 1.96 SEm SEm = SD/√n

Math
a. No, players of other sports not represented. b. Yes, it is open-ended.

Statistics
https://www.google.com/search?client=safari&rls=en&q=Tukey's+HSD+test&ie=UTF-8&oe=UTF-8

statistics
8. A 9. B

science
To keep the next generation from having double the species number of chromosomes.

algebra 1
x - 315/21 = 9 Solve for x.

Math
Assuming a normal distribution: 95% A = 1.2 ± 2 * .1 95% B = 1.5 ± 2 * .9

math
Cannot post graph here. Pick various values of x and calculate corresponding values of y. Draw your graph.

Psychology
Understanding the world around us. Does that correspond to any of your choices?

math
Multiply both sides by P and divide both sides by 300 to solve for J.

Statistic in Social Science
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(.90, .15, etc.) and related Z score. Insert into above equation and solve for score. For last two (c & d) so...

statistics
Without more data, I would also pick C.

Math
√-1 = i https://www.google.com/search?client=safari&rls=en&q=square+root+of+negative+one&ie=UTF-8&oe=UTF-8

Math
First of all, range is not a measure of central tendency. Since hours are numerical, eliminate C. However, since the data is not given, we cannot know if there are a significant number of outliers on one side (skewed distribution) or not. If so, median. If not, mean. The mean ...

Science. Check Answer
I assume you are referring to the physics definition of work. 1. W 2. W 3. N 4. W 5. W 6. N 7. W 8. W 9. W 10. N In physics, a force is said to do work when it acts on a body, and there is a displacement of the point of application in the direction of the force. For example, w...

math
a. Matched pairs c. 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...

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

math question
From your data, 63% + 9% = ?

Science
Since this is not my area of expertise, I searched Google under the key words "contribution of African elephant to world" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=contribution+of+African+elephant+to+world&ie=UTF-8&oe=UTF-8 I...

Statistics
Use data from your previous post. 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 your Z score.

Statistics (?)
Lacking data. https://www.google.com/search?client=safari&rls=en&q=cats+sleep+time&ie=UTF-8&oe=UTF-8

Probability
How does she know that she wasn't picking the same marble each time?

Sociology
A little additional information: http://drdavespsychologypage.homestead.com/Person_Perception__East_vs__West.pdf

Sociology
Assuming that you comparing Oriental (Easterners) vs. Occidentals (Westerners), Agree

Sociology
Disagree

Biology
The female has to be GG, and the male has to be bb. (Cannot be Gb.) The above are the genotypes. Use a Punnett Square to calculate offspring. https://www.google.com/search?client=safari&rls=en&q=Punnett+square&ie=UTF-8&oe=UTF-8

math
If x = shorter piece, then 4x = longer. x + 4x = 35 Solve for x.

Psychology
To find out if the test measures what it is supposed to measure (validity), test results are compared to some criterion.

Math
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 (.025) related to the Z score.

Math needs Help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-.95]/2 = .05/2 = .025) and its Z score. A. 95% = mean ± 1.96 SEm SEm = SD/√n

science (?)
How do you define "food miles" and "food points"?

ap statistics
Same as previous post.

ap statistics
Ho: mean1 = mean2 Ha: mean1 > mean2

Math
Circumference = 2πr = 2 * 3.14 * 8 = ?

Science
Since this is not my area of expertise, I searched Google under the key words "limitations for modeling mitosis" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=limitations+for+modeling+mitosis&ie=UTF-8&oe=UTF-8 In the future, you ...

science
Since the consumers eat the producers, I think more producers would lead to more energy available to the consumers.

ap 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.

ap 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 later post.

health sciences
Since this is not my area of expertise, I searched Google under the key words "changes that occur in the DNA of muscle fibers during exercise" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=changes+that+occur+in+the+DNA+of+muscle+...

science
acceleration?

Math
Right!

ap statistics
If you have multiple samples, their means will have a distribution. The mean and SD for that distribution answers your question.

Biostatistics (?)
If the data is missing, how can you put it in?

Science (?)
None listed. You cannot copy and paste here.

Statistics
https://www.google.com/search?client=safari&rls=en&q=pearson+correlation+calculator&ie=UTF-8&oe=UTF-8

math
R/2 = G G + R + 8 quarts = R/2 + R + 2 gallons = 14 gallons Solve for R.

statistics (?)
What is (are) your question(s)?

Math
https://www.google.com/search?client=safari&rls=en&q=Statistical+trees+branches&ie=UTF-8&oe=UTF-8

science
Consumer?

math
4 times as many as 8 = 8 * 4 = 32 1/4 as many as 8 = 1/4 * 8 = 8/4 = 2 Cannot draw on these posts.

SCIENCE (incomplete)
No chart. Cannot copy and paste here.

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

Health
Lack of professionals to access, cost of accessing, lack of trust of professionals, not believing they need help

Math
Read my answer again. m = math time.

Math
Let m = math time, then English = 3m and science = 2m. m + 3m + 2m = 120 minutes Solve for m, then 2m.

science
How about feathers, wings and beaks? https://www.google.com/search?client=safari&rls=en&q=bird+characteristics&ie=UTF-8&oe=UTF-8

math (?)
Same thing here.

math (?)
"jpg" indicates you are copy and pasting. Can't do it here.

Science
https://www.google.com/search?client=safari&rls=en&q=Dilithium&ie=UTF-8&oe=UTF-8 What conclusion do you come to?

Biology help
We know that certain genes have specific effects on one's phenotype. However, Outside of containing DNA, we do not know how they cause these effects. https://www.google.com/search?client=safari&rls=en&q=How+does+a+gene+determine+a+trait%3F&ie=UTF-8&oe=UTF-8

math
It would help if you proofread your questions before you posted them. Millimeters is a length unit rather than volume. Even if this was changed to milliliters, the question is still unclear.

Science
Merely by writing these sentences will help you to remember the material you have written. Information in the following articles might also help. http://drdavespsychologypage.homestead.com/Be_Here_Now_.pdf http://drdavespsychologypage.homestead.com/Learning_Requirements.pdf ht...

maths
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. Is it less than .05?

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 te...

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

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 = ?

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 < √2...

Stats.
What about the women that tested negative for cancer?

statistics (?)
No table. You cannot copy and paste here.

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.

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.

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.

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 informati...

Science
https://www.google.com/search?client=safari&rls=en&q=increase+the+magnetic+field+around+a+wire%3F&ie=UTF-8&oe=UTF-8

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 r...

Algebra
60 - 60/3 - 60/4 = ?

Probability (?)
Five defects out of how many? What size sample?

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 = sq...

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

Math
L > 3s + 4

math
x/17.5 = 12/5 Solve for x.

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

statistics (?)
Lacking data.

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 informa...

math (?)
What is your question?

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 informati...

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.

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

Ollu
How close will you be standing to the mirror?

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

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).

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+d...

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

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" k...

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.

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?

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.

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.

statistics
Ho: µ = sample mean

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