Wednesday

December 17, 2014

December 17, 2014

Total # Posts: 18,849

**statistics**

Ho: µ Pop = µ sample Ha: µ Pop < µ sample 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 ...
*May 4, 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.
*May 4, 2014*

**Science**

Since this is not my area of expertise, I searched Google under the key words "ethical issues behind cloning" to get these possible sources: http://search.aol.com/aol/search?query=ethical+issues+behind+cloning&s_it=client-addressbarmac-unauth In the future, you can ...
*May 4, 2014*

**Statistics**

Statistical?
*May 4, 2014*

**algebra (?)**

What is your question?
*May 4, 2014*

**algebra**

(7√π)/(√π) = 7
*May 4, 2014*

**Science**

Since this is not my area of expertise, I searched Google under the key words "Forces affecting falling objects" to get these possible sources: http://search.aol.com/aol/search?query=Forces+affecting+falling+objects&s_it=client-addressbarmac-unauth In the future, you...
*May 4, 2014*

**Statistics**

95% = mean ± 1.96 SEm SEm = SD/√n Where does 4 cm fit in this distribution?
*May 4, 2014*

**applied 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. Would you say that mother's age might cause number ...
*May 4, 2014*

**math**

295 + .15(k-1000) < 389 Solve for k.
*May 3, 2014*

**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 "...
*May 3, 2014*

**Math**

Q = 2.5D 10D + 25Q = 225 Substitute 2.5D for Q in second equation and solve for D. Insert that value into the first equation and solve for Q. Check by inserting both values into the second equation.
*May 3, 2014*

**statistics**

4. C 5. B
*May 3, 2014*

**statistics**

B. However, there is no data given that indicates which diet lost more pounds.
*May 2, 2014*

**Science**

Essentially all species have dominant and recessive traits. Once you know the genotypes of the parents, you can use a Punnett square to determine the frequencies in the offspring.
*May 2, 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.
*May 2, 2014*

**math 1 question pls help!!!**

(138-129)/138 = ?
*May 2, 2014*

**Math needs help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
*May 2, 2014*

**algebra (?)**

It would help if you proofread your questions before you posted them. What is the power of x?
*May 2, 2014*

**maths**

3.14 = π. Are you sure that value is for the radius? SA = πrs + πr^2
*May 2, 2014*

**Math**

(x^3-2x-4)/(x-2)
*May 2, 2014*

**statistics**

Were the subjects expressing liking of both animals the same or different? Need to know total number of subjects.
*May 2, 2014*

**Statistics**

Gets smaller
*May 2, 2014*

**math**

No figure shown. Online "^" is used to indicate and exponent, e.g., x^2 = x squared. It would help if you proofread your questions before you posted them. You omitted π. V = 4/3πr^3 = 4/3 * 3.14 * 4.5 * 4.5 *4.5 = ?
*May 2, 2014*

**math (?)**

What formula?
*May 2, 2014*

**Math 2**

3/5
*May 2, 2014*

**Algebra**

(1/3)/4 = ?
*May 2, 2014*

**Science**

No, what if the water is calm?
*May 2, 2014*

**Math**

Only 8/8 and 2/2 can be written as 1.
*May 1, 2014*

**statistics**

two-sample t-test
*May 1, 2014*

**Space Exploration**

Can you divide into capital and maintenance costs?
*May 1, 2014*

**math**

Since this is not my area of expertise, I searched Google under the key words "how much lottery revenue has been allocated to education in North Carolina" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=how+much+lottery+revenue+has...
*May 1, 2014*

**math (?)**

What are your choices? You cannot copy and paste here.
*May 1, 2014*

**Math**

It doesn't look like you did a problem. 2x - 28 + 3 = 7x + 5 -30 = 5x -6 = x
*May 1, 2014*

**Statistics**

.05 * 300 = 15 This means you would expect 15 tests to be significant solely by chance.
*May 1, 2014*

**Statistics**

With your limited data, I would pick C, because the confidence level includes zero.
*May 1, 2014*

**science**

Since this is not my area of expertise, I searched Google under the key words "restriction enzymes genetic engineering" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=restriction+enzymes+genetic+engineering&ie=UTF-8&oe=UTF-8 In ...
*May 1, 2014*

**Algebra**

https://www.google.com/search?client=safari&rls=en&q=math+ac+method&ie=UTF-8&oe=UTF-8
*April 30, 2014*

**biology**

Since this is not my area of expertise, I searched Google under the key words "ways that DNA mutation can alter genetic material" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=ways+that+DNA+mutation+can+alter+genetic+material&ie=...
*April 30, 2014*

**algebra**

Z = (score-mean)/SD Insert values and solve for SD.
*April 30, 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 30, 2014*

**Probability**

One parent is Bb and the other is bb. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8
*April 30, 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 30, 2014*

**Probabitilty**

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 30, 2014*

**science**

Since this is not my area of expertise, I searched Google under the key words "ocean area with few living things" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=ocean+area+with+few+living+things&ie=UTF-8&oe=UTF-8 In the future, ...
*April 30, 2014*

**Algebra 2**

Online "^" is used to indicate and exponent, e.g., x^2 = x squared. 5^4 = 5 * 5 * 5 * 5 = 625
*April 30, 2014*

**math (?)**

What is your question?
*April 30, 2014*

**math**

$154,330 * .045 = $6944.85
*April 30, 2014*

**statistics (?)**

What is your question?
*April 30, 2014*

**statistics**

A. Pairs were not matched. Sample too small for Z test. Group differences not measured by correlation.
*April 30, 2014*

**Math**

220 * 2 * $.75 = ?
*April 30, 2014*

**Math**

22,000/400 = ?
*April 30, 2014*

**math**

35 * 20 * 5 * 7 = ?
*April 30, 2014*

**statistics**

Inadequate data. 95% = mean ± 1.96 SEm SEm = SD/√n
*April 30, 2014*

**Math**

a. No, players of other sports not represented. b. Yes, it is open-ended.
*April 29, 2014*

**Statistics**

https://www.google.com/search?client=safari&rls=en&q=Tukey's+HSD+test&ie=UTF-8&oe=UTF-8
*April 29, 2014*

**statistics**

8. A 9. B
*April 29, 2014*

**science**

To keep the next generation from having double the species number of chromosomes.
*April 29, 2014*

**algebra 1**

x - 315/21 = 9 Solve for x.
*April 29, 2014*

**Math**

Assuming a normal distribution: 95% A = 1.2 ± 2 * .1 95% B = 1.5 ± 2 * .9
*April 29, 2014*

**math**

Cannot post graph here. Pick various values of x and calculate corresponding values of y. Draw your graph.
*April 29, 2014*

**Psychology**

Understanding the world around us. Does that correspond to any of your choices?
*April 29, 2014*

**math**

Multiply both sides by P and divide both sides by 300 to solve for J.
*April 29, 2014*

**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) ...
*April 29, 2014*

**statistics**

Without more data, I would also pick C.
*April 28, 2014*

**Math**

√-1 = i https://www.google.com/search?client=safari&rls=en&q=square+root+of+negative+one&ie=UTF-8&oe=UTF-8
*April 28, 2014*

**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 ...
*April 28, 2014*

**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, ...
*April 28, 2014*

**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...
*April 28, 2014*

**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 ...
*April 28, 2014*

**math question**

From your data, 63% + 9% = ?
*April 28, 2014*

**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 ...
*April 27, 2014*

**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.
*April 27, 2014*

**Statistics (?)**

Lacking data. https://www.google.com/search?client=safari&rls=en&q=cats+sleep+time&ie=UTF-8&oe=UTF-8
*April 27, 2014*

**Probability**

How does she know that she wasn't picking the same marble each time?
*April 27, 2014*

**Sociology**

A little additional information: http://drdavespsychologypage.homestead.com/Person_Perception__East_vs__West.pdf
*April 27, 2014*

**Sociology**

Assuming that you comparing Oriental (Easterners) vs. Occidentals (Westerners), Agree
*April 27, 2014*

**Sociology**

Disagree
*April 27, 2014*

**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
*April 27, 2014*

**math**

If x = shorter piece, then 4x = longer. x + 4x = 35 Solve for x.
*April 27, 2014*

**Psychology**

To find out if the test measures what it is supposed to measure (validity), test results are compared to some criterion.
*April 27, 2014*

**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.
*April 27, 2014*

**Math needs Help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
*April 27, 2014*

**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
*April 27, 2014*

**science (?)**

How do you define "food miles" and "food points"?
*April 27, 2014*

**ap statistics**

Same as previous post.
*April 26, 2014*

**ap statistics**

Ho: mean1 = mean2 Ha: mean1 > mean2
*April 26, 2014*

**Math**

Circumference = 2πr = 2 * 3.14 * 8 = ?
*April 26, 2014*

**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 ...
*April 26, 2014*

**science**

Since the consumers eat the producers, I think more producers would lead to more energy available to the consumers.
*April 26, 2014*

**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.
*April 25, 2014*

**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.
*April 25, 2014*

**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+...
*April 25, 2014*

**science**

acceleration?
*April 25, 2014*

**Math**

Right!
*April 25, 2014*

**ap statistics**

If you have multiple samples, their means will have a distribution. The mean and SD for that distribution answers your question.
*April 25, 2014*

**Biostatistics (?)**

If the data is missing, how can you put it in?
*April 25, 2014*

**Science (?)**

None listed. You cannot copy and paste here.
*April 25, 2014*

**Statistics**

https://www.google.com/search?client=safari&rls=en&q=pearson+correlation+calculator&ie=UTF-8&oe=UTF-8
*April 24, 2014*

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