Thursday

November 27, 2014

November 27, 2014

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**

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

What is your question?
*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*

**Algebra**

8/2a
*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**

http://drdavespsychologypage.homestead.com/Two___Two_____four.pdf
*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**

https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8
*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**

https://www.google.com/search?client=safari&rls=en&q=right+atrium+to+the+lungs&ie=UTF-8&oe=UTF-8
*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*

**reading (?)**

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*

**Planets- I Love Space!**

gravity?
*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*

**Algebra help please!**

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*

**Algebra help PLEASE?**

Google "combinations and permutations."
*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**

How can we help you?
*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*

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