Lv 2458 points

# milo

• ### Are my answers right (macroeconomics)?

1) According to the short-run Phillips curve, if unemployment is 3.2% and inflation is 1.3%, an increase in the inflation rate might result in which of the following?

a) a decrease in the demand for labor in the economy

c) an increase in the unemployment rate to 3.4%

d) a decrease in the unemployment rate to 3.0%

I'm thinking the answer is c here.

2) The cost to firms of changing prices

a) does not exist if inflation is perfectly anticipated.

b) is called a menu cost.

c) is small even when there is rapid inflation.

d) all of the above.

I know it's a menu cost, but I'm not sure about the other 2 options.

3) If inflation is perfectly anticipated,

a) those that hold paper money lose.

b) those that lend money lose.

c) those that borrow money lose.

d) no one in the economy loses.

I'm pretty sure it would be d here.

-Thanks for any help with these.

• ### Quick question about Statistics (standard error)?

The mean diameter of ping pong balls is 1.3 inches and have a standard deviation of .04 inches. A random sample of 36 ping pong balls is selected. What is the value of the standard error of the mean?

Would I just do 0.04 / squre root of (36) = 0.04/6= .0006667?

-Thanks for any help.

• ### Question about Statistics (standard error)?

The mean diameter of ping pong balls is 1.3 inches and have a standard deviation of .04 inches. A random sample of 36 ping pong balls is selected. What is the value of the standard error of the mean?

Would I just do 0.04 / squre root of (36) = 0.04/6= .0006667?

-Thanks for any help.

• ### Question about Statistics (standard error)?

The mean diameter of ping pong balls is 1.3 inches and have a standard deviation of .04 inches. A random sample of 36 ping pong balls is selected. What is the value of the standard error of the mean?

Would I just do 0.04 / squre root of (36) = 0.04/6= .0006667?

-Thanks for any help.

• ### Question about Statistics (standard error)?

The mean diameter of ping pong balls is 1.3 inches and have a standard deviation of .04 inches. A random sample of 36 ping pong balls is selected. What is the value of the standard error of the mean?

I'm not sure about which formula to use here, I tried using st. dev sub x bar first and then Z=x bar - u sub x bar/st dev. sub x bar/square root of n. And the answer I got was -184.714, which I'm pretty sure is wrong.

Any help would be appreciated. Thanks.

• ### Quick question about Statistics?

Use the binomial table to find the exact value of P(x > or equal to 7).

Given: p=.4 and n=25.

On the table, I understand that the p value would be .40, but I don't know what the k value would be. Would I just use 7 or a number greater than 7? If so, than how do I know which one to choose?

-Thanks for any help.

• ### Question regarding Statistics?

I got this question partially wrong on an exam and I'm trying to figure out why:

Suppose x is a binomial random variable with p=.4 and n=25.

a) Use the normal approximation to find P(x is greater than or equal to 7)

-What I did was first get q, which is .6. Then, I got u by multiplying np (25*.4), which was 10. After that, I got the standard deviation, which is the square root of npq, (25*.4*.6), which was the square root of 6, which is 2.449. To get P(x is greater than or equal to 7), I used the formula Z=x sub CF -u / st. dev., which was 6.5-10/square root of 6, which is -3.5/-1.429, which equals 2.45. But, according to my professor, that should be -1.43. What I don't understand is how it can be -1.43.

-Thanks for any help.

• ### Question regarding Statistics?

I got this question partially wrong on an exam and I'm trying to figure out why:

Suppose x is a binomial random variable with p=.4 and n=25.

a) Use the normal approximation to find P(x is greater than or equal to 7)

-What I did was first get q, which is .6. Then, I got u by multiplying np (25*.4), which was 10. After that, I got the standard deviation, which is the square root of npq, (25*.4*.6), which was the square root of 6, which is 2.449. To get P(x is greater than or equal to 7), I used the formula Z=x sub CF -u / st. dev., which was 6.5-10/square root of 6, which is -3.5/-1.429, which equals 2.45. But, according to my professor, that should be -1.43. What I don't understand is how it can be -1.43.

-Thanks for any help.

• ### Quick question regarding Accounting (Balance Sheet)?

I know how to prepare a balance sheet, but I'm not sure where I would put an entry such as:

I think that's considered to be an asset, but I'm not sure where it should be placed on the balance sheet.

Thanks in advance for any help.

• ### Help with a Javascript question?

http://img106.imageshack.us/img106/2021/javascript...

I'm confused as to why the output has 2 '\$' and 4 '*' in the first line instead of 1 '\$' and 2 '*'.

-thanks for any help.

• ### Help with a Javascript code?

<script type = "text/javascript">

var a = 7, b = 10;

for ( var i=0; i<5; i++)

{

a = b++ + i;

}

document.write("<p align = \"right\">" + a + "<br>"

+ b + "</p>");

</script>

I understand why b would be 15, but I'm confused as to why a is equal to 18. When i=0, a = 15. When the loop stops at i=4, wouldn't the value of a be 19 instead of 18?

-Thanks.

• ### Help with a Javascript Code?

<script type = "text/javascript">

var X = new Array();

for(var i=0;i<5;i++)

X[i]=i*i;

for(i=4;i>=0;i--)

document.write(X[i] + "<br>");

</script>

I know that the output of this code would be:

16

9

4

1

0

My question is why isn't the output: 0,1, 4, 9, 16, 16, 9, 4 ,1 0. Why wouldn't the first five numbers be outputted?

-Thanks.

• ### Help with a Javascript code?

<script type = "text/javascript">

var X = new Array();

for(var i=0;i<5;i++)

X[i]=i*i;

for(i=4;i>=0;i--)

document.write(X[i] + "<br>");

</script>

I know that the output of this code would be:

16

9

4

1

0

My question was why does the code skip the first 'for' loop and only use the values described in the second 'for' loop?

-Thanks.

• ### Help with a Calculus question?

Estimate the area under the graph of f(x)= x^2 + 3 x from x=5 to x=9 using 4 approximating rectangles and left endpoints.

(I tried using Riemann's sum to get the answer, but it came out to be an awkward answer.)

-thanks for any help.

• ### Need help with a Calculus question?

Estimate the area under the graph of f(x)= x^2 + 3 x from x=5 to x=9 using 4 approximating rectangles and left endpoints.

(Would I solve this using Riemann's sum or would that be wrong?)

-thanks for any help.

• ### Need help with a Calculus question?

http://img257.imageshack.us/img257/3600/questionfr...

(Would I have to get rid of the dx from the numerator or does that not matter? Also, would the e get rid of the ln when I evaluate or not?)

-Thanks for any help.

• ### Need help with a Calculus problem?

http://img264.imageshack.us/img264/1311/question7r...

(Using the midpoint method, I got 203/3, which is wrong. Could someone tell me what I did wrong?)

-thanks for any help.

• ### Need help with Calculus problem?

http://img264.imageshack.us/img264/2225/question8w...

(Should I take the 2 out of the limit or would that be the wrong thing to do? And if it is, what should I do instead?)

-thanks for any help.

• ### Need help with a Calculus problem?

http://img264.imageshack.us/img264/1311/question7r...

(For the midpoint rule, am I suppose to plug in values at F(x) =1.5, 2.5, and 3.5 and then add those values up? If that's the case, I did so and got -210.75, which is wrong.)

-thanks for any help.