Thursday

November 26, 2015
Total # Posts: 20,775

**statistics**

It is just due to chance variation.
*June 23, 2015*

**biology**

What is your hypothesis? Do you have a control group? Are they alive? If alive, they would probably swim around.
*June 23, 2015*

**bio**

Since this is not my area of expertise, I searched Google under the key words "what happens when alveoli are destroyed" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=what+happens+when+alveoli+are+destroyed&ie=UTF-8&oe=UTF-8&...
*June 22, 2015*

**math**

Data Missing. What type of figure are you measuring?
*June 22, 2015*

**Algebra**

L = 2W + 4 2L + 2W = 30 Substitute 2W+4 for L in second equation and solve for W. Insert that value into the first equation and solve for L. Check by inserting both values into the second equation.
*June 22, 2015*

**Statistics**

Z = (score-mean)/SD = (33.88-33.8)/SD SD =√variance
*June 20, 2015*

**statistics**

Populations have parameters, but samples have statistics. This is a measure of central tendency.
*June 20, 2015*

**Science**

Wherever the tectonic plates meet, they are likely. Does this happen in all countries?
*June 19, 2015*

**intro to psychology**

supported by empirical data
*June 19, 2015*

**intro to psychology**

hypothesis? Assumption?
*June 19, 2015*

**psychology**

I searched Google under the key words "APA informed consent" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=APA+informed+consent&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information you desire more quickly, if ...
*June 19, 2015*

**Biology**

Disagree
*June 19, 2015*

**PSYCH**

https://hardsci.wordpress.com/2012/03/12/some-reflections-on-the-bargh-doyen-elderly-walking-priming-brouhaha/
*June 19, 2015*

**math**

Yes.
*June 18, 2015*

**psychology**

Historically, it would most likely be C.
*June 18, 2015*

**Statistics**

Normal distribution not needed. Can do Chi-square (X^2) test. https://www.google.com/search?client=safari&rls=en&q=chi+square+calculator&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*June 18, 2015*

**Statistics**

Lacking data. What was the mean and standard deviation of the change in cholesterol levels?
*June 18, 2015*

**psy410**

Agree. They can all cause cognitive problems. Google each to verify.
*June 18, 2015*

**appliances**

Since this is not my area of expertise, I searched Google under the key words "purpose of the external jumper wire on a variable-speed reversing drill switch" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=purpose+of+the+external+...
*June 18, 2015*

**Statistics**

Look at the abscissa (X-axis) for the value of 2.
*June 17, 2015*

**math**

Got it!
*June 17, 2015*

**math**

If the final = four regular exams: Mean = ∑x/n = ((87*4) + 70 + 92)/6 = ?
*June 17, 2015*

**math**

Lacking needed data.
*June 17, 2015*

**psychology**

I searched Google under the key words "how depression affects friendships" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=clinical+depression+friendships&ie=UTF-8&oe=UTF-8&gws_rd=ssl#q=how+depression+affects+friendships In the ...
*June 17, 2015*

**Stats**

No data given.
*June 16, 2015*

**algebra**

What is your question?
*June 16, 2015*

**math**

V = w * L + h = 4 * 23 * 7 = 644 Yep!
*June 16, 2015*

**Math**

Assuming that it is a square with three matchsticks on each side, matchsticks can be added internally to give nine squares with each side of one matchstick.
*June 15, 2015*

**Math**

"ordered pairs"? Total cost = $30x
*June 15, 2015*

**statistics**

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 = square root of variance 95% = mean ± 1.96 ...
*June 15, 2015*

**Statistics**

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.005) and its Z score. 99% = mean ± Z * SEm SEm = SD/√n = s/√N
*June 14, 2015*

**math**

100,000
*June 14, 2015*

**Statistics**

Neither. r varies between +1 and -1.
*June 13, 2015*

**Statistics**

95% = 148 ± 1.96 (35/30) =148 ± 1.96(1.17) = 148 ± 2.287 = 145.713, 150.287 Is that what you calculated?
*June 12, 2015*

**math**

Typos. If you draw 12, how would you get "5 out of 10" any color?
*June 12, 2015*

**STATS**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/56 * 1/(56-1) * 1/59 = ?
*June 12, 2015*

**Statistics**

Use correlation coefficient. https://www.google.com/search?client=safari&rls=en&q=correlation+coefficient&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*June 12, 2015*

**Statistics**

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.005) and its Z score. 3 = Z (s/√n) = 2.575 (15.8/√n) Solve for n.
*June 12, 2015*

**Statistics**

Agree.
*June 11, 2015*

**Math (Finite)**

Lacking data. What is the makeup of the group they are selected from?
*June 11, 2015*

**Math (Finite)**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 10^5 = ?
*June 11, 2015*

**Biology**

Use Pennett square for father (pp) and mother (Np). https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*June 11, 2015*

**Math**

What parts?
*June 11, 2015*

**Stats**

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.
*June 11, 2015*

**Stats**

See later post.
*June 11, 2015*

**Biology**

Use Punnett square. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*June 9, 2015*

**statistics**

P = 100!/(2!)(100-2)! = 100!/(2)(98!) = 100*99/2 = 9900/2 = ?
*June 9, 2015*

**statistics**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
*June 8, 2015*

**Stats**

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 between the two Z scores.
*June 7, 2015*

**Algebra**

Welcome
*June 7, 2015*

**Algebra**

The answers you have chosen are right. For unanswered problem, .018 * 800 = ?
*June 7, 2015*

**math**

V = π r^2 * h = π (8/2)^2 * 8 = π * 16 * 8 = ?
*June 6, 2015*

**math**

P = n!/r!(n-r)! = 7!/5!(7-5)! = (7*6)/2 = ?
*June 6, 2015*

**math**

V = π r^2 h = π (14/2)^2 * 20 = π 49 * 20 = 980 π 980 π = π (10)^2 * h 980 = 100h Solve for h.
*June 6, 2015*

**Math**

32/(18+30+32) = ?
*June 6, 2015*

**Stats**

No numerical data.
*June 5, 2015*

**Bio**

Changes
*June 4, 2015*

**HELP!! Statistics!**

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 = square root of variance Z = (mean1 - mean2)/...
*June 3, 2015*

**Algebra 1**

Z = (score-mean)/SD
*June 3, 2015*

**Algebra**

Z = (score-mean)/SD
*June 3, 2015*

**Algebra 1**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/5 * 2/3 = probability they are chosen for speaking roles. Subtract from 1 to get chorus probability.
*June 2, 2015*

**math algabra**

W = 2L W * L = 162 2L * L = 162 Solve for L then W.
*June 2, 2015*

**STATISTICS**

Lacking Data.
*June 2, 2015*

**Math**

Welcome
*June 1, 2015*

**Math**

f(x) = .5(2x) = .5(2*2) = .5(4) = 2
*June 1, 2015*

**health**

However, they can be reduced or eliminated, if the person seeks therapy from a qualified psychotherapist. https://www.google.com/search?client=safari&rls=en&q=treating+anxiety+disorders&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*June 1, 2015*

**health**

However, they can be reduced or eliminated, if the person seeks therapy from a qualified psychotherapist.
*June 1, 2015*

**Math (Statistics)**

Data lacking. Without knowing population mean, standard deviation and sample size, it is impossible to know. 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 ...
*May 31, 2015*

**Algebra 1**

I saw 130, which minus 4 = 126.
*May 31, 2015*

**Algebra 1**

In contrast to Reiny, I factor to get (2x+18)(x-7) = 0 Since the distance cannot be negative: x = 7 x + 2 = 9
*May 31, 2015*

**Algebra 1**

Factor to solve for x, which cannot be negative. 126 = 3 * 2 * 7 * 3 = 18 * -7 Work it from there.
*May 31, 2015*

**Statistics**

Welcome!
*May 30, 2015*

**Statistics**

.1 + .1 + .2 = .4
*May 30, 2015*

**Math, help plz**

Data lacking. Whichever has the smallest frequency.
*May 30, 2015*

**science**

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. Google each of those terms. Don't just copy the material. Express the ideas in your own ...
*May 30, 2015*

**Algebra**

If n = 150% m = 1.5m n > m
*May 29, 2015*

**Algebra**

You did a good job with a. If there are no parentheses, multiply first before adding or subtracting.
*May 28, 2015*

**Algebra**

-18 ≠ 18 I'll leave you to show the steps. x = 17
*May 28, 2015*

**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.
*May 28, 2015*

**English**

Agree
*May 28, 2015*

**Biology ASAP**

1. afferent vs. efferent vs. interneurons (look up) 2. http://en.wikipedia.org/wiki/Cochlear_nerve
*May 28, 2015*

**Science (theory of evolution)**

https://www.google.com/search?client=safari&rls=en&q=cladogram+worksheet&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*May 27, 2015*

**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.
*May 27, 2015*

**1st grade math**

Did you find it
*May 27, 2015*

**1st grade math**

How about 10 + 10 + 10 + 4 = 34? Cannot draw pictures on these posts.
*May 27, 2015*

**Pychology**

What are your choices?
*May 27, 2015*

**Statistics 2023**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Assuming that you are saying that 23.8% of the 11.2% of the 20+ joggers are female, I would say .112 * .238 = ,0267. However, ...
*May 27, 2015*

**INTERVAL OF THE MEAN**

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 ± Z (SEm) SEm = SD/√n
*May 26, 2015*

**Biology**

Since this is not my area of expertise, I searched Google under the key words "radioactive decay" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=radioactive+decay&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
*May 25, 2015*

**Algebra 1**

No equations. Set both y's = to each other.
*May 25, 2015*

**Statistics**

To figure the probability, the pass mark is extraneous information, not needed. 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 ...
*May 25, 2015*

**Stats**

One is the opposite of the other. If the confidence interval = 95%, then the level of significance = P = .05, assuming a two-tailed test.
*May 24, 2015*

**P.E.**

Agree.
*May 23, 2015*

**Math**

Glad to see some of your thinking. I think what you call "explanatory" and "response" variables are what we call independent and dependent variables. "Confounding" = extraneous. Although weather is an extraneous variable, weather effects can be ...
*May 23, 2015*

**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.
*May 23, 2015*

**Stats**

a. Z = (score-mean)/SD = (6820-7500)/1750 = -.39 Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score = .3483. b. Mean the same, but SEm = SD√n. Standard Error ...
*May 23, 2015*

**Statistics**

However, if you need sample of thousands to get statistical significance, it probably is not of practical significance in individual cases.
*May 23, 2015*

**Statistics**

https://www.google.com/search?client=safari&rls=en&q=practical+statistical+significance&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*May 23, 2015*

**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.
*May 22, 2015*

**English**

Since this is not my area of expertise, I searched Google under the key words "interpreting scantron scores" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=reading+scantron+scores&ie=UTF-8&oe=UTF-8&gws_rd=ssl#rls=en&q=interpreting...
*May 22, 2015*