# Posts by PsyDAG

Total # Posts: 23,426

**Math**

1-3. Wrong. Pay attention to ± signs. Did not go further.

**Number problems**

Starting with 12, go up the line with numbers that factor with 3 until you find one that sums to 1/3 the value. That's what I did to get the answer.

**Psychology Stats and Research**

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. I will start you out. State with your own notations. Ho: no difference H1: difference Z = (...

**Psychology**

An example of testing for the truth would be the validity scales of the MMPI. https://scholar.google.com/scholar?q=mmpi+validity+scales&hl=en&as_sdt=0&as_vis=1&oi=scholart&sa=X&ved=0ahUKEwi70PP18NHTAhXklFQKHV9QClkQgQMIKjAA

**Algebra B (?)**

Not sure of your notation. 4/?150 divided by ?189x?

**math (?)**

Divide it equally in terms of how many parts? Can pour from 5 liters into 3 liters to get 4 equal parts of 2 liters.

**statistic**

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 Use the previous process...

**statistic**

Use same process shown in previous post.

**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 "areas under ...

**Decision tool (?)**

What data?

**Science**

They are both processes of cell division.

**Math**

If the median is from a larger population, then it can be true. If the median is just for the 10 students, then it cannot be true. The median is the 50th percentile.

**Math**

The mean serves as a fulcrum for the distribution, so it is affected by extreme scores in either direction. If they had a day in which they sold very many cameras, this would bias the mean. I would choose the median (50th percentile).

**math (?)**

What is your question?

**math**

Agree

**maths variation**

If this is in relation to a previous question, you need to restate that question.

**Statistics (?)**

What is your question?

**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 related to the Z scores.

**statistics**

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. Also, we do not have access to those studies. However, for (a) an experiment has: An ...

**Biomechanics (?)**

What do you need to solve?

**Mrs Sue Math**

Does D = d? 18d = -18 Take it from here.

**maths**

Variation? 15 sec = 1800m 15/1800 = x/648 Solve for x.

**Biology**

https://en.wikipedia.org/wiki/Punnett_square

**Statistics**

Do not understand "x~N(80,100)". 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 the Z scores.

**Educational Tech**

Agree

**math**

Let x = one number and x+7 the other. x + x + 7 = 31 Solve for x, then x+7.

**math**

18.45/3 = 6.15 195/6.15 = ?

**ELA Please check my work**

A pronoun (I, me, he, she, herself, you, it, that, they, each, few, many, who, whoever, whose, someone, everybody, etc.) is a word that takes the place of a noun. In the sentence Joe saw Jill, and he waved at her, the pronouns he and her take the place of Joe and Jill, ...

**Statistic**

Arrange in order of value. It would range from the 4th ranked to the tenth.

**Systems Analysis and Design**

Cannot draw on these posts.

**Math (?)**

Regroup? 99 - 91 = 8

**Statistics**

99% = mean ± Z(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 (.005) and its Z score. Insert data into above equation.

**statistics**

a-c) Z = (score-mean)/SD Find table in the back of your statistics text labeled something like like "areas under normal distribution" to find the proportion/probability related to the Z scores. (d,e) Look up % in table to get Z score.

**Scientific Method**

How did he roll it? Did he give it a push or just let it roll by itself? If he just let it roll by itself, I don't detect any error, except that he might want to repeat the rolls many times, to make sure that the differences were not merely chance occurrences.

**Test Wiseness**

Please pass this on to that student. 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 ...

**Math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 24,000 * .04 * 30 = 28,800

**Math (Probability)**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 13/52 * 12/51 * 11/50 * 10/49 = ?

**Math**

1/2 * 1/2 = ?

**Math**

68%

**Math**

It is ± 1 SD. Use the rule.

**Math 120**

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 in the larger portion related to the Z score.

**Maths**

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.

**Geometry**

Volume = 8(?)2.5^2 = ?

**math (?)**

What is your question?

**Math**

Since order is not specified, with 4 possible outcomes, the probability of HT or TH = 1/2

**Biology**

Yes, when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand.

**bio**

For example, if AB and OO type parents have children, the children will only be BO or AO.

**Math**

Volume = height * length * width Insert values to solve.

**Math**

You have shown no work of your own. I will help you a little. 3. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

**Science (?)**

Have no idea what the t's indicate.

**Math**

It would help if you proofread your questions before you posted them. I assume you mean "8,600,000" and "by 14,000 MORE than one tenth of the previous population." 1.1(8,600,000) + 14,000 = ?

**Science**

Disagree

**math**

Cannot draw line plots on these posts nor can I identify a table that is not shown. You cannot copy and paste here. mean = sum of scores/number of scores = ?x/n Mode = most frequently occurring score. Median = 50th percentile I'll let you do the calculations.

**statistics**

White = 8/11 Black = 3/11 1) If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P(BW) = 3/11 * 8/11 P(WB) = 8/11 * 3/11 Either-or probabilities are found by adding the individual ...

**Math**

If he loses "Rs 3" on every bottle, there is no gain. Have you omitted some data?

**Science**

I would say D.

**Psychology (?)**

What are your choices?

**Algebra**

Cannot put table on these posts.

**math**

The largest area would be closest to a square. a) two 3-foot sections on each side, with two 3-foot sections and the gate on the center. b) three 3-foot sections on the two sides with the gate on one side. I'll let you do the calculations.

**Math**

Agree.

**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. Also, on 9, there is no spinner shown. Cannot copy and paste here.

**MATHS**

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.

**psychology**

68%

**Math**

1. 15/20 = 3/4 = .75 2. 120 *.75 = ?

**Math**

The blue cars are the 4, so the red cars > blue cars. 7/4 = x/168 x = 294

**Math**

Area of base = 9*6/2 Volume = area of base * height Do the calculations.

**Math**

Welcome

**Math**

h = 11 * 4 b = 8 * 4 * 2 Combine them.

**Advance maths**

Cannot draw on these posts.

**geometry**

The maximum would be closest to a square. 2000m/3 = 667m 677^2 = ?

**MATHS PLEASE HELP ME**

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. Make an attempt to solve these on your own, so we will respond. Consult your text.

**Maths**

1) 2,000 + 3,000 - 4,000 = ? 2) If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3 * 2 * 2 = ? 3) 4^10 = ?

**math**

The numbers are the square of 2,3,4,5 and 7. Did you leave 36 out?

**Statistics**

60 - 40 = 20 55 to 60 = 6 Take it from there.

**statistical reasoning**

Null hypothesis = they are independent (there is just chance variation) Alternate hypothesis = they are not independent

**biology (?)**

What following? Cannot copy and paste here.

**Math**

A variable is something that varies/changes. Lisa - 7

**Quantitative Statistic**

Accept H1 when z < 1.96 Z = (score-mean)/SEm SEm = SD/?n Z = (215-220)/(15/8) = -5/1.875 = -2.667 Agree with e.

**Quantitative Statistic**

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.

**Business (Partial)**

1) Even if you pay more than the minimum, the interest will eat up whatever advantage you have in reward points or more. 2) Google simple vs compound interest. https://www.google.com/search?client=safari&rls=en&q=simple+vs+compund+interest&ie=UTF-8&oe=UTF-8 3) If he cannot pay...

**Psychology**

https://www.google.com/search?client=safari&rls=en&q=2+by+2+factorial+design&ie=UTF-8&oe=UTF-8

**Science**

The flowers need to have the hummingbird transfer the pollen from one flower to another as it drinks the nectar. What answer does that lead you to?

**Science**

Hummingbirds do not land on the flowers. They drink while in flight.

**science**

Since this is not my area of expertise, I searched Google under the key words "stages of thunderstorm development" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=3+stages+of+thunderstorm+development&ie=UTF-8&oe=UTF-8 In the future...

**Math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3/15 * (3-1)/(15-1) = ?

**Math (?)**

What is your question?

**Science**

Angle of incidence is a measure of deviation of something from "straight on" and may refer to: Angle of incidence (aerodynamics), the angle between the chord of the wing and the longitudinal axis of the fuselage. Angle of incidence (optics), describing the approach ...

**math**

100A + 70C = 1100 50A + 50C = 625 Divide first equation by 2. 50A + 35C = 550 Subtract that from the second equation. 15C = 75 Solve for C, then insert into any of above equations to find A.

**Math**

6/.2 = 30 Cannot diagram on these posts.

**math**

Anything times zero = 0

**Math (?)**

No equations. Cannot copy and paste here.

**Maths**

Agree with B. B. How many had salad? 18 Of those, how many also had fruit? 7 So it is 7/18

**statistics**

(a) Sample mean is expected to be the same. (Standard Error of the mean) SEm = SD/?n (b) Assume equal times. One bulb = 500 hours. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the ...

**Math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. I am assuming that you want to know how many glasses it will fill. 4 cartons * 2/3 = 8/3 Therefore it would fill 8 glasses.

**Math**

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 = ?

**Algebra**

Multiply the first equation by 12a and the second equation by 6 to solve.

**Math**

Cannot draw on these posts.

**Math**

-18+11 = -7

**Math**

Not sure what you are asking. 700?

**science**

Where do you live? What is the source of energy for the electric company in your area?