Monday

April 21, 2014

April 21, 2014

Total # Posts: 17,499

**Biology**

I'm not sure exactly what you are asking. In psychology, positive control (or at least an attempt at it) involves incentives and rewards. Negative aspects involve punishment or lack/removal of reward. If this is what you are seeking, you should be able to think of examples.

**Algebra**

You got them all correct.

**Math**

Multiply first equation by 2. Assuming that y was accidentally eliminated in the second equation. 4x - 10y = 6 -4x + 10y = -6 Adding the two together: 0 = 0. One equation is just the negative of the other. In other words, if you multiply one equation by -1, you get the other.

**Statistics (?)**

What is your question?

**Science (?)**

What type of wave?

**math**

4/5 + 4/5 = ?

**math**

3/5 * 10 = ?

**math**

1/2 * 1/3 = ?

**math**

3 * 4 = ?

**statistics (?)**

What is your question? If you want to know Kelsey's score: Z = (score-mean)/SD -1.85 = (score-72)/4

**statistics**

(100*10)/(7*60) = ?

**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.

**Algebra!**

(1) Let x = standard shipments and y = express. y = 108 - x 3.5x + 7.5y = 506 Substitute 108-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. (2) Use similar process ...

**science**

I assume you only need to determine the sex chromosomes. The daughter has XX sex chromosomes. Since she has hemophilia, a recessive gene on the X chromosome, she must have inherited the hemophilia from both parents. However, since the son also receives an X chromosome from mom...

**Statistic**

See your previous post.

**Statistic**

62,400/(100*#workdays in a year) = ?

**Statistics**

You might want to round it to the nearest person. It rounds to 17, but if you want all the records to be covered, you might round it up to 18. This would give the FTEs a little slack.

**Statistics**

8600/(100*5) = ?

**biology**

The girls all receive normal X chromosome from dad, meaning they cannot be more than carriers. If males get recessive gene, they will have hemophilia since there is no dominant gene on the Y chromosome to supress the hemophilia gene. How do you get six variations? XCXC, XcY XC...

**math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Assuming the comma has the same meaning as a period in the USA: 2.3 * -5 = -11.5

**Statistics**

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 * (13*3)/48 = ?

**Statistics 2**

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

**Math**

1600 + 17600*.081 + (29700-17600)*.09 = ?

**algebra 1**

With answer from B, Mean(for median) = (B + ?)/2 = 227

**algebra 1**

A. mean = ∑x/n = (225+245+222+230+x)/5 = 221 Solve for x. B. Arrange 5 score in order of value. Middle score is the median. C. With even number of scores, mean of the two middle scores = median

**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 score.

**Math.stat help :(**

Ho: mean1 = mean2 Ha: mean1 ≠ mean2 Since these are just samples rather than the whole population, µ is an inappropriate designation. µ is parameter rather than a statistic. Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(...

**statistics**

It is the Z test (google it). Where is your confusion centered?

**statistics**

Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n (n = # of trips) If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled somethin...

**Health (Ms. Sue)**

1. They could view genetics as a boon or threat, which would influence their dealings greatly. What would do if you thought something was a boon… or a threat? 2. I would need to know first what the news reports actually say.

**Child development**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. I would say B.

**math**

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 "area...

**biology**

https://www.google.com/search?client=safari&rls=en&q=DNA+RNA+polymerases+similarities&ie=UTF-8&oe=UTF-8

**biology**

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

**science**

Clouds of what? http://scienceline.ucsb.edu/getkey.php?key=884

**science**

The sun does not have an atmosphere or crust.

**maths**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. However, the sign is not needed, if a parenthesis is present. 2y(-28)=48 -56y = 48 y = 48/-56 Reduce.

**statistics**

A parameter is data about the whole population, while a statistic deals with a part of the population, a sample. What does that tell you?

**Biology**

It's possible, but what type of genes are going to be inserted? Who will determine who will get what genes? As with medicine, will there be unintended side effects? That should give you a start.

**communicate**

This is asking for your response to an unknown artifact. Our psychic abilities are limited or nonexistent.

**statistics psy/315**

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 "area...

**math (?)**

No information above. Original price of chair missing.

**math (?)**

Data missing. A parameter is a measure on the total population, while a statistic is a measure on a portion of the population.

**statistics**

A normal distribution approximates a bell-shaped curve. Outliers to one side would skew the distribution. If the distribution was flat, having about the same frequencies throughout the distribution, this would be non-normal. Also a bimodal distribution would be non-normal, sug...

**Statistics**

% = mean ± Z(SEm) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (%/2) from the mean and its Z score. Substitute values into above equation and calculate. If you d...

**statistics**

right.

**math (?)**

What is your question?

**pre-algebra (?)**

What model?

**science**

Since this is not my area of expertise, I searched Google under the key words "Lamarck vs. Darwin differences" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=lamarck+vs+darwin+differences&ie=UTF-8&oe=UTF-8 In the future, you can f...

**statistics (?)**

What following? 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 score. This may help you decide.

**Math**

I am assuming the Eric is ON the train. 24/3 = 8 ft./sec. 8 + 80 = ?

**Science**

I would assume so. 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.

**algebra 2**

Except for multiplying/dividing by a negative number, treat just like an equation. First get rid of the parentheses by multiplying. 2x - 10 > 6x -18 Subtract 2x from both sides and add 18 to both sides. You should be able to work it from there.

**medical needs help**

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

**statistics**

Cannot sketch on these posts. 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 related to the Z scores.

**science**

What type of mutations are you referring to? Dominant? Recessive? Other?

**science**

1. B 2. B

**statistics (?)**

Where is your data?

**math (?)**

Powers not shown.

**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 "area...

**Statistics**

Right

**College Algebra (?)**

What line? Graphics cannot be posted.

**stastistics**

Null hypotheses propose no effect.

**College 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. See your later post.

**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. I answered this before. Carriers have the recessive gene in their genotype, b...

**Statistics**

% = 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 ([1-%]/2) to find the Z score. Insert that into ? position. Example: 95% = 74.8 &...

**Statistics**

% = mean ± ? SEm Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability ([1-%]/2) and its Z score. Enter Z score for ?. Solve for intervals.

**Statistics**

A null hypothesis expects no difference.

**Algebra 1**

72 + 4(12-6) = ?

**biology**

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

**math(check answers please)**

1. B 2. A 3. 3f + 2f = 5f

**Math**

1, 2. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3. 8 lots total. With each selection, there is one less large lot and one less total. 6/8 * 5/7 * 4/6 = ? 4. 6/15 * 5/14 = ?

**Psy/355**

I searched Google under the key words "motivation" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=motivation&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more quickly, if you use appropriate key words t...

**Statistics**

The smallest is most significant.

**physical (?)**

What statements?

**Math/Science**

(58.7 * 10^16)/(9.3 * 10^4) = ? seconds To convert to hours, multiply by 360. For days, multiply again by 24. For years, multiply again by 365. for centuries, multiply again by 100.

**science**

Not sure what this statement means. The light from the sun gets stronger at sunrise and weaker at sunset, but the radiation from the sun is about the same under both conditions.

**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.

**Statistics**

Ho: Smpking does not effect the period of gestation. Generalize from the above to other null hypotheses.

**math (?)**

What are your choices?

**Science**

To carry the disease means that it is in the genotype but not the phenotype. That would happen with a recessive gene. It will occur.

**Math (?)**

We cannot view graphs on these posts.

**Math**

Please, where is the specific question?

**math**

5 + 4.75 + 2.25 = ? Convert to feet and inches.

**algebra**

Subtract 3x from both sides, then divide both sides by 6.

**math**

1.483.56 has 6 significant figures.

**algebra**

A square has all sides of equal length. You do not have a square. For a rectangle, 2[(4x+3)+3(2x - 5)] = ?

**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**

$14,260/24 = $594.17 19.63/594.17 = ?

**statistics (?)**

What is your question?

**Math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. How did you get zero? In all = 9 * 3 = ? Twice = 2 times 9 * 2 = 18

**Math**

Right. See later post for second problem. 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**

All correct except 3. Each basket in basketball counts as two points. Also, online “*” is used to indicate multiplication to avoid confusion with “x” as an unknown.

**statistica**

Conclude H1 at the 5% level of significance, since it is a one-tailed test and it is well beyond the 90% confidence limits.

**stats**

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

**Statistics**

a, b. No inferences being made. c. There is no data for other nights, so this is an inference.

**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.

**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.

**science10**

To get help, you need to post specific questions.

**Statistics**

Proportion = # in category/total number

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