# Posts by PsyDAG

Total # Posts: 23,198

**Math**

7.5

*May 3, 2016*

**Math Please Help (?)**

No graphs. Cannot copy and paste here.

*May 3, 2016*

**Math**

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

*May 3, 2016*

**Math**

One Gallon = 4 quarts One pint = 2 cups one Quart = 2 pints

*May 2, 2016*

**math**

Convert all to cl. 1500 - 20x = 60 Solve for x.

*May 2, 2016*

**Science (?)**

What is your question?

*May 2, 2016*

**Math**

4/12 = ?

*May 1, 2016*

**math**

Answering your question for one toss. Are you looking for P(2-4)? Either-or probabilities are found by adding the individual probabilities.

*April 30, 2016*

**algebra**

Subtract 2x^2+5x-10 (from?) 3x^2-x+9 (3x^2-x+9) - (2x^2+5x-10) = x^2 -6x + 19 What grid?

*April 30, 2016*

**MATH**

2 + (-3) = ? -7 + 4 = ? -1(-7) = 7 Typo?

*April 30, 2016*

**Algebra**

Object 1 travels 9 feet per second. Object 2 travels 10 feet every 60 seconds.

*April 29, 2016*

**Math**

Assuming that you want to generalize to all cancer patients, all cancer patients would be the population, the 675 patients would be the sample, and the 76% and 63% are statistics.

*April 29, 2016*

**Statistics**

Wouldn't the probability of rejecting the null hypothesis be easier(more likely), if you have a larger alpha level? In other words, if you are using P=.05 it is easier to reject the null hypothesis than if you were using P=.01.

*April 29, 2016*

**Stat**

Do you have a typo? It would take an extremely deviant score (>100) to drop the mean from 100 to 9 by omitting it.

*April 29, 2016*

**algebra**

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

*April 28, 2016*

**Math**

Assuming that two numbers that = 11 are the tens and hundreds places: 6 + 5 = 11 659

*April 28, 2016*

**Math**

(17+15)/total number = ? Multiply ? by 100.

*April 28, 2016*

**science help pls pls**

If a plurality of scientists disagree, would you call it accurate?

*April 28, 2016*

**Algebra**

How about C, S and U too?

*April 28, 2016*

**statistics**

Z = (score-mean)/SD (one trout) 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. Z = (score-mean)/SEm SEm = SD/√n Use Same Table. 93.8% = mean &...

*April 28, 2016*

**maths olympiad**

https://www.google.com/search?client=safari&rls=en&q=class+six+Maths+olympiad&ie=UTF-8&oe=UTF-8&gws_rd=ssl

*April 28, 2016*

**math**

One similarity is that 85, 17, 19 and 2 are all < 100.

*April 28, 2016*

**Genetics**

All the children will receive the dominant X^D from mommy. What does that tell you?

*April 27, 2016*

**math (?)**

How big is the container that is being painted?

*April 27, 2016*

**math**

Ones digit is 9, hundreds is 3.... Take it from there.

*April 27, 2016*

**Maths**

B = A + 15 B + 25 = 3A Substitute A+15 for B in the second equation and solve for A.

*April 27, 2016*

**Probability**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events (9/10).

*April 27, 2016*

**statistics**

Z = (mean-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 Z. Is it ≤ .01?

*April 27, 2016*

**math 102**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 95/100 * 95/100 * 5/100 = ?

*April 27, 2016*

**prealgebra**

You are welcome.

*April 27, 2016*

**prealgebra**

Incorrect probability. P(5) = 1/6 for one toss P(5) = (1/6)^12 for 12 tosses However, with your data, I would agree with C.

*April 27, 2016*

**Math**

Doesn't a plus sign (+) tell you to add? m^2 - 9

*April 27, 2016*

**math**

1.25/20 = x/6 Solve for x.

*April 27, 2016*

**GEN.**

In terms of perception, background is the area around whatever your figure is. In terms of a person, background is his/her past experiences.

*April 27, 2016*

**Physics**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. What are your choices?

*April 27, 2016*

**science**

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

*April 27, 2016*

**Math-probabilities**

13,100/312,000,000 = ?

*April 26, 2016*

**Math (???)**

You assume that we know the grading scale for your class. Wrong assumption.

*April 26, 2016*

**math**

a. 99% = mean ± Z SEm SEm = SD/√n find the table in the back of your text labeled "areas under normal distribution to find the proportion (±.005) and its Z score. Insert into equation above and calculate. b. One is increase sample size.

*April 26, 2016*

**math**

When multiplying terms, you add the exponents.

*April 26, 2016*

**math**

20/6 = 3 1/3 cases needed. Given that, how many extra packs will she have?

*April 26, 2016*

**Math needs help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. That is what Reed is suggesting.

*April 26, 2016*

**science**

Since this is not my area of expertise, I searched Google under the key words "Mendeleev's periodic table" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Mendeleev's+periodic+table&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the ...

*April 26, 2016*

**Biology**

Right

*April 26, 2016*

**Math**

What if it wasn't cut into 8 pieces? 6/19 = ?

*April 26, 2016*

**Mathematics**

Still need more data.

*April 26, 2016*

**Mathematics**

Need More data. Base?

*April 26, 2016*

**Healthcare Statistics**

t with 18 df at .05 = 2.101 What does that tell you?

*April 25, 2016*

**Math**

Need data. What facts beside those two numbers do you have?

*April 25, 2016*

**spanish**

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. What are your answers?

*April 25, 2016*

**math**

Is the fourth included in those that fell on the floor? Was there a fifth pearl? If the first answer is no and the second yes, the other half of the pearls = 1 + 1 + 1 + 3 = 6

*April 25, 2016*

**Math**

x/2 + (x-3)/5 = 2/3x x/30 + (6x-18)/30 = 20/30x 15x + 6x - 18 = 20x 18 = x That's my answer too.

*April 25, 2016*

**stats**

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities (.10, .35 & .77) and the corresponding Z scores. Insert into equation above.

*April 25, 2016*

**academic and communicative skills**

Research health care delivery system problems on Google. https://www.google.com/search?client=safari&rls=en&q=Research+health+care+delivery+system+problems&ie=UTF-8&oe=UTF-8&gws_rd=ssl

*April 25, 2016*

**maths**

Add the two equations to give you: 2/x = 6 Solve for x, then y.

*April 25, 2016*

**English (?)**

How is this English?

*April 25, 2016*

**math**

60*2 + 15 - 45 - 35 = ?

*April 25, 2016*

**Science**

Moon gravity is only .17 that of earth.

*April 25, 2016*

**math (?)**

What do the dimensions stand for? length? width? Depth?

*April 24, 2016*

**Algebra**

Disagree.

*April 24, 2016*

**Statistics**

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) and its Z score. Insert in equation above and solve for score.

*April 24, 2016*

**Math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/26 * 1/10 * 1/10 = ?

*April 24, 2016*

**Math**

Since the mean, median and mode are the same in a normal distribution, mean and median both probably 150. Since approximately 68% score ±1 SD, I would estimate SD at slightly less than 10.

*April 24, 2016*

**mathslit accounting life science tourism**

Consult your school counselor, who can estimate your abilities and interests and the careers they correspond to.

*April 24, 2016*

**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 24, 2016*

**statistics**

4/5^17

*April 24, 2016*

**Science**

Something that allows a current to flow through it. A person who leads an orchestra.

*April 24, 2016*

**math**

To find it, just look at it. If you are asking for probabilities: even number = 1/2 >6 = 7 or 8, each = 1/8 Either-or probabilities are found by adding the individual probabilities.

*April 23, 2016*

**Math**

Put the value to zero for each one in the equation.

*April 23, 2016*

**Math**

Good!

*April 23, 2016*

**science**

Since this is not my area of expertise, I searched Google under the key words "function of pore in a cell membrane" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=function+of+pore+in+a+cell+membrane&ie=UTF-8&oe=UTF-8&gws_rd=ssl In...

*April 23, 2016*

**science (?)**

What is your question?

*April 22, 2016*

**Stat**

a. Either-or probabilities are found by adding the individual probabilities. 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. Add the two. b. If the events ...

*April 22, 2016*

**science**

Since this is not my area of expertise, I searched Google under the key words "titanium reacts with oxygen" to get these possible sources: https://search.yahoo.com/yhs/search?p=titanium+reacts+with+oxygen&ei=UTF-8&hspart=mozilla&hsimp=yhs-002 In the future, you can ...

*April 22, 2016*

**Math: Statistics**

It would depend on what level of significance you are using. Typically it is P ≤ .05. If you are using this cut-off point and the level you found was .061, you should say that the relationship was a chance one.

*April 22, 2016*

**math (?)**

You do not indicate how length is related to either width or height or the volume.

*April 22, 2016*

**Math- I'd really appreciate it if you could help!!**

We would appreciate it if you could state the problem without all the dollar signs ($).

*April 21, 2016*

**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. Also post with the same name. See your later post.

*April 21, 2016*

**mathes**

How do you define "under age"… less than the mean? Mean = sum of scores/number of scores I'll let you do the calculations.

*April 21, 2016*

**STAT**

99% = mean ± Z (SEm) SEm = SD/√n Z for ±.005 = 2.575 Calculate.

*April 21, 2016*

**mathematics**

Lacking data. What is its shape?

*April 21, 2016*

**Statistical work**

Z = (score-mean)/SD Use table In back of text labeled area under normal distribution. C. Either-or probabilities found by adding individual probabilities. D,E. Both probabilities found by multiplying individual probabilities.

*April 21, 2016*

**Stat HW for.**

1b. 1/4 = .25 Probability of both found by multiplying individual probabilities. E. .5 * (1-.25) = ?

*April 21, 2016*

**Statistics**

Z = (mean-mean)/SEm SEm = SD/sqrt n Use table in back of text labeled area under normal distribution.

*April 21, 2016*

**Statistical concept 68-95-99.7**

Don't repeat posts. It wastes our time responding to them. See your later post.

*April 21, 2016*

**Maths!**

Lacking data. How many colors/marbles?

*April 21, 2016*

**Stat**

Z = (score-mean)/SD Use table labeled area under normal distribution in the back of your text. Either-or probabilities found by adding individual probabilities. Both probabilities found by multiplying individual probabilities.

*April 21, 2016*

**3rd grade math**

Yes

*April 20, 2016*

**MATH**

A more exact answer to cups = 5/(5+1+3+2) = 5 /11 = .45

*April 20, 2016*

**MATH**

3/(6+1+2+3) = ?

*April 20, 2016*

**MATH!**

Boys< 30-16

*April 20, 2016*

**MATH**

Without the outlier, the mean (which functions as a balance point) would be lower.

*April 20, 2016*

**math**

2/5 * 150 = ?

*April 20, 2016*

**Math**

54/(7+2) = 6 Multiply the 7 and 2 by 6.

*April 20, 2016*

**Math**

See your later post.

*April 20, 2016*

**Math**

Second and third choices are correct. The correlation would only show straight line if there was perfect predictability (+1.00) for the positive trend.

*April 20, 2016*

**math**

2 * 3= ? 10 * 15 = ?

*April 20, 2016*

**stats**

Z = (52-50)/SEm SEm = SD/sqrt n Look up Z in table in back of your text labeled area under normal distribution.

*April 20, 2016*

**math**

Why do you divide the width by 4? Is That because the length is 1/4W?

*April 20, 2016*

**math**

You do not state relationship between width and length.

*April 20, 2016*