# Posts by PsyDAG

Total # Posts: 23,510

**stats**

I don't know how you did it in class. 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 for the Z score. How does it compare to your ...

**Science**

With multiple choice, treat each alternative as a T-F question. If you don't know right answer, before guessing, eliminate wrong alternatives. This increases the chances of your guess being correct. Chemical change.

**health**

Although all are true, I would pick tissues.

**math**

What is YOUR reasoning?

**MATH**

12 * 12 = 144 inches on each side. 144/9 = 16 (16*3)+2 = ?

**Spanish**

Right, but it requires a following verb.

**Math**

D = 3S (42+10) + S+10 + D+10 = 100 Substitute 3S for D in the second equation and solve for S. Insert that value into the first equation to solve for D. Check by putting both values into the second equation.

**Math**

I don't know about "free calculators" mean, but all you need to do is insert various values for x and calculate the y value that matches. e.g., y = 8-8 = 0

**Statistics Range, Variance, and Standard Deviation**

Range = highest value - lowest Find the mean = 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 ...

**Statistics Homework**

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 "...

**Statistics**

From the sample, with only 6 of 20 earning the degree in 4 years, it does not seem "common."

**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. See previous post.

**Alegebra**

When multiplying/dividing, exponents are added/subtracted respectively. 5^12 5x^2 + 6x - 2

**science**

The force was not great enough?

**science**

It would help if you proofread your questions before you posted them. How much did it increase per year? Remember, there are 3 years of interest.

**math**

10z - 4 + 8z - 8 = 18z - 12

**Science**

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.

**Science**

What are your choices? GPS?

**math (?)**

What items? You cannot copy and paste here.

**Math**

-3 - 2 + 9 = ?

**Math (?)**

What size tiles?

**ICT(?)**

Lacking data.

**ICT (?)**

Lacking data.

**life orientation (?)**

What is your question?

**DPS**

10m + .1m(5*12) = ?

**Science**

Advice to the exam-lorn ("test wiseness") I. Answer easy items first. If have to think about any question after reading for more than a minute, move on. A. Can get Qs you are sure of correct within the time limit. Spending too much time on hard questions, might keep ...

**Math Help please!**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 5/14 * 2/(14-1) = ?

**math**

Question unclear. First draw 20/70 = ? Two draws, both green with replacement: If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 20/70 * 20/70 = ?

**Math (?)**

No designs shown. Cannot copy and paste here.

**Math statistics**

Approximately 50% if males are also included in the 25-35 group.

**math**

16 * 4 = ?

**math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/6 * 2/8 = ?

**Pre-Algebra**

4y + 4 + 3y - 18 + 14 = 28 Combine like terms and solve for y.

**Statistics**

SEm = SD/√n

**Math**

Need parentheses. (9-3)/(1/3+1)? 9 - (3/[1/3]) + 1? 9 - 3/(1/3+1)?

**Math**

8t + 12 = 8t + 12 (identity) -3m - 7 = -3m + 7 (Typo?) yes, t = 15

**math (really?)**

Start with ball, gall, mall, glub, glum, lamb, mull.... Can you think of others?

**life sciences (?)**

No graph or question.

**Science ?**

What data do you want to collect?

**statistics**

9 * 10^4

**Statistics Algebra 2**

How does a differ from c? If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. b) (3/4)^20 c) "at least 6" translates to either 6, 7, 8, 9 or 10. Either-or probabilities ...

**Maths**

(1-2/3)x = 19 Solve for x.

**Math**

3/5q-(1/5+2q) = .6q-.2-2q = -.2-1.4q

**Science**

"High, thin, feathery clouds" are not the ones that cause any rain.

**math**

p = M/9n

**math**

60(1-5/6) = 60(1/6) = 10 60 + 10 = 70 60 km in 5/6 hour = 70km/hr 54(1-2/3) = 54(1/3) = 18 54 + 18 = 72 54km in 2/3 hour = 72km/hr 72/70 = ?

**Math**

What are your choices?

**Stat**

Typos? C is incomplete. I assume that (s) indicates your answer. Agree with d and b, but also would include a. How is e different than b?

**Urgent =Math**

Disagree. Sample of 6 too small.

**Urgent =Math**

agree on both.

**science**

What are your choices?

**math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .25 * .25 * .50 = ?

**Math**

Something seems wrong here. Would this mean that, if the ride is only 9 miles, John would not have to pay anything?

**Math**

200/5 = 40/1 or 40 miles per inch. Take it from there.

**Math (help)**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/2 * 3/6 = ?

**math**

When x = -2 then -5(-2+2) = -5(0) = 0

**Math ---HELP!!!!!**

I misread the Question, so your answer

**Math ---HELP!!!!!**

Agree.

**Math ---HELP!!!!!**

Disagree. "More than" includes everything below the mean.

**Math ---HELP!!!!!**

disagree Z = (score-mean)/SEm SEm = SD/√n Use previously mentioned table.

**Math ---HELP!!!!!**

agree

**Math ---HELP!!!!!**

right

**Math ---HELP!!!!!**

Sorry, I didn't see your answer. You are right.

**Math ---HELP!!!!!**

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 for the Z score. Multiply by 100. However, if you realize that the mean and median are the same in a normal ...

**Math ---HELP!!!!!**

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 for the Z score. Multiply by 100.

**Algebra**

Perimeter = 2L + 2S Area = L*S

**Maths**

340/x

**MATH ANSWER HELP**

What is you question?

**math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3/12 * 2/7 = ?

**math**

3/6 = ? http://drdavespsychologypage.homestead.com/Odds__Figuring.pdf

**Science one question dont understand plz help ASAP**

I don't understand your question either. Miles is distance, while months is time. Do you have some type of conversion equation?

**Math**

disagree. % above +1 SD.

**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**

agree.

**Algebra (?)**

Lacking data. Cannot copy and paste here.

**math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. How long is a marathon? Don't understand your hint. Typos?

**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 later post.

**Math**

agree with second answer.

**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.

**math**

Absolute value is the value regardless of the sign, 10.

**math literacy, life science, history,sotho**

Consult with your school counselor, who can help you assess your abilities and interests to determine which careers would suit you. Cost will vary with amount of advanced training needed.

**Algebra**

y = √(3x+3) For x = 2 y = √(3*2 +3) = √9 = 3

**science**

It is extremely unlikely that any tutor has access to your text. in addition, 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. You can submit...

**math**

How can player Pi win, if "i<j"?

**Math**

Welcome

**Math**

Assuminga normal distribution, 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 ...

**Math**

Since you are dealing with a select group, I would expect little variation. 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.

**maths(Please help me out)**

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 each Z score. Multiply by 80.

**Math (Mrs. Sue, please help?)**

y = 3x + 4 2x + 3y = 10 Substitute 3x+4 for y in the second equation and solve for x. Insert that value into the first equation to solve for y. Check by putting both values into the second equation.

**Psychology**

It makes it easier for us to respond, if the answer is indicated in the question, e.g., ***. 13. correct 14. Assuming that people have self-limiting assertions, I would pick C. 15. Disagree 16. Disagree 17. disagree 18. disagree 19. disagree 20. DK Have you used your textbook?

**Psychology**

Disagree with all. Use your textbook!

**Psychology**

After responding to your later posts, I'm not even going to bother responding to this post until you indicate that you have put some real effort into finding the answers.

**Psychology**

You need to study. Disagree on both.

**Psychology**

Wrong again, B.

**Math**

To meet a 27 mpg requirement, you need to be at least 27 mpg.

**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 other post.

**Math (?)**

No graph. Cannot copy and paste here.

**science**

internal pressure in the can

**science**

What are your choices?

**Writing-research**

https://www.google.com/search?client=safari&rls=en&q=writing+research+topic&ie=UTF-8&oe=UTF-8&gws_rd=ssl