Thursday

April 24, 2014

April 24, 2014

Total # Posts: 730

**STATS **

Suppose we are testing the null hypothesis H0: ì = 20 and the alternative Ha: ì 20, for a normal population with ó = 5. A random sample of 25 observations are drawn from the population, and we find the sample mean of these observations is = 17.6. The P-val...

**Stats**

Damon, thank you!

**Stats **

Assume that event A occurs with probability 0.4 and event B occurs with probability 0.5. Assume that A and B are disjoint events. The probability that either event occurs (A or B) is A. 0.0 B. 0.7 C. 0.9 D. 1.0.

**Stats**

These are my options. A.0.30 B.0.40 C.0.60 D.0.90

**Stats**

I added the mean of 21 and SD of 10 and the probability is 0.9715. That is not one of my options, please help!

**Stats **

The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. The value of P(X < 10) is

**Stats**

Let the random variable X be a random number with the uniform density curve given below. P(0.6 < X < 0.9) is

**Statistics**

Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ score separating the top 37% from the others. Answer in one decimal place.

**Chemistry**

What is the enthalpy change if 25.0 g of methane are burned? 890kJ of heat released for every mole of methane that reacts. CH4 + 2O2 = CO2 + 2H2O

**Stats**

4. A least squares regression line to predict a student’s Stat145 test score (from 0-to-100) from the number of hours studied was determined from a class of 55 Stat145 students: ̂ = 48.2 + 2.21x. One student in the class studied for 18 hours and scored 82 on the exam...

**Statistics**

Thank you! :)

**Statistics **

In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured. Tread depth is measured in “mils.” Here...

**STAT - Please check answer**

In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured. Tread depth is measured in “mils.” Here...

**Math **

Archaeologists often find only parts of ancient human remains. For example, they may find a small finger bone, called the metacarpal bone. Is it possible to predict the height of a human from the length of his or her metacarpal bone? To investigate, a researcher measures the h...

**STATS**

Is the answer C?

**STATS**

So B is not the correct answer?

**STATS**

Archaeologists often find only parts of ancient human remains. For example, they may find a small finger bone, called the metacarpal bone. Is it possible to predict the height of a human from the length of his or her metacarpal bone? To investigate, a researcher measures the h...

**STATS **

Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. Using the 68-95-99.7 rule, what is the lower bound for the weight of the top 2.5% of students?

**STATS**

Yes! Thanks. :) I have one more question. Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. Using the 68-95-99.7 rule, what is the lower bound for the weight of the top 2.5% of students.

**STATS**

Thank you that helps a lot. I have been struggling with this. C. What percent of students weigh less than 60.1 kilograms? Z=(60.1-75.5)/10.3=-1.49 I checked the z-table and the probability is .0681. .0681*100=6.8% Is this problem correct?

**STATS**

Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. B. What percent of students have weights greater than 80.1 kilograms?

**STATS**

Thanks!

**STATS **

Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. A. 45% of the student weights are above ____ kilograms? Z=.3264=x-75.5/10.3 Now what?

**stats**

how do I find the margin of error for the given values of c,s,and n c=0.95, s=2.1,n=100

**Physical Science**

(c) ____Cl2(g) + ____KBr(aq)h____Br2(l ) + ____KCl (aq) (d) ____CH4(g) + ____O2(g)h____CO2(g) + ____H2O(l )

**Math URGENT PLEASE**

If a car in 1963 cost @$2,400 How much would that be in 2012

**Math URGENT PLEASE**

Please Help, The last question has to be done by midnight. A chevy Bel Air, a classic car today, cost $2,400.0 new in mid-1963. How much would that be in 2012 dollar.

**algebra**

Please Help, The last question has to be done by midnight. A chevy Bel Air, a classic car today, cost $2,400.0 new in mid-1963. How much would that be in 2012 dollar.

**Mathematics**

calculate the CPI for this year and for 5 years from now. Project the price 5 years from now of an item that you commonly buy. **Dunkin Donuts Coffee**** $2.04 Please help, I know I am missing something. Thanks

**Math**

HELP: Does THIS LOOK OK SO FAR? NEED HELP WITH THE REST, PLEASE! A 1963 Chevy Bel Air, a classic car today, cost $2400 new in mid-1963. How much would that be in 2012 dollars? Cost 2012 = CPI in 2012 Cost 1963 = CPI in 1963 Cost in 2012 = 232.0 $2,400 30.6 Cost in 2012= $2,400...

**math**

A 1963 Chevy Bel Air, a classic car today, cost $2400 new in mid-1963. How much would that be in 2012 dollars?

**math**

Saving for retirement by contributing the same amount each month from your 23rd birthday until your 65th birthday, in an account that pays a steady 4% annual interest compounded monthly. How much will be in your fund at age 65 if you save $100 a month?

**Math**

A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young TWO MONTH after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young ONE MONTH later. None of th...

**Math**

A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young ONE MONTH after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young ONE MONTH later. None of th...

**Math**

A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young one month after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young one month later. None of th...

**Math**

With these ideas in mind, evaluate—in a paragraph each—the following data depictions. U.S. Federal Budget Policy Outlays by Category for 2015. (U.S. Federal Budget for 2011.) p. 153. This display shows expected expenditures of the federal government in 2015, totaling...

**math**

If anyone has "For All Practical Purposes" I am stuck on page 680, Writing Project # 2. It is just to long to post.

**Math**

How can I rewrite this statement for my math class: "The war funding bill...passed this week, but with three times fewer Democrats voting for it than did the last year.

**Math**

If a dollhouse was made out of the same material as a real house, how would their weights compare?

**Math**

12''

**Math**

Dollhouse and the furnishing are built to a scale of exactly 1 in. to 1 ft, what is the linear scaling factor?

**Math**

Growth rate of odd size object: Start: 1.5" w by 1.5" l by .25" h End: 3.25" w by 3.50" l by .25" h Did this object increase by 600%? Some people tell me approx. 500% and 405% Which is it and how do you do the math for the correct answer?

**math**

Please I need help: I need to figure out the procedure to this question: Growth rate of odd size object: Start: 1.5" w by 1.5" l by .25" h End: 3.25" w by 3.50" l by .25" h Did this object increase by 600%? How do I figure this out? Thank you very...

**Math**

Steve, Sam or Salah, How do you come up with your answers of 500%, 505 405% Please and Thank you, Tracy

**Math**

Growth rate of odd size object: Start: 1.5" w by 1.5" l by .25" h End: 3.25" w by 3.50" l by .25" h Did this object increase by 600%?

**Algebra (Pythagorean Theorem)**

Ahmed has half of a treasure map. which indicates that the treasure is buried in the desert 2x + 6 paces from castle rock. Vanessa has the other half of the map. Her half indicates that to find the treasure one must get to castle rock walk x paces to the north and then walk 2x...

**Algebra**

Thank you

**Algebra**

I was not asking if it was a Pythagorean Theorem? This is the equation that I have to solve

**Algebra**

This is a Pythagorean Theorem x^2 + (2x + 4)^2 = (2x + 6)^2

**Algebra**

thank you

**Algebra**

Help I'm stuck I need to factor a trinomial expression using the AC method 15x^2 + 31x + 2

**Algebra**

I need to know how to factor these in A-C method form 2a^2+1+3a 9w-w^3

**Algebra (factoring Polynomials)**

I need to know how to factor these in A-C method form 2a^2+1+3a 9w-w^3

**Algebra (factoring Polynomials)**

Thank you. Can you please do this in the ac method form?

**Algebra (factoring Polynomials)**

9w-w^3 2a^2+1+3a

**math**

if Ted's front porch is 9 and 3/4 inches by 4 feet.How long is his porch?

**Algebra**

(-9x^3 + 3x^2 -15x)divided by (-3x) Find the quotient

**Polynomials**

In order for me to understand I need step by step explanations.

**Polynomials**

still confused

**Polynomials**

P dollars is invested at annual interest rate r for 1year If the interest is compounded semiannually then the polynomial P(1+r/2)^2 represents the value of the investment after 1 year. rewrite the expressions without parentheses evaluate the polynomial if P=5670 and r=3.5%

**algebra**

find the quotient (-9x^2 + 3x^2- 15x) - (-3x)

**Algebra**

P dollars is invested at annual interest rate r for 1year If the interest is compounded semiannually then the polynomial P(1+r/2)^2 represents the value of the investment after 1 year. rewrite the expressions without parentheses evaluate the polynomial if P=5670 and r=3.5%

**Algebra**

I have two questions dealing with financial polynomials. $6780 compounding 2.5%interest once a year yields? in interest 5760 compounding 3.5 interest once a year yields? in interest

**Algebra**

Ozark furniture company can obtain at most 3000 board feet of maple lumber for making its classic and modern maple rocking chairs. A classic maple rocker requires 15 board feet of maple and a modern rocker requires 12 board feet of maple. write an inequality that limits the po...

**Algebra**

a line passes through the point (4,1) and has a slope -4 write an equation for this line

**Algebra**

graph the line with slope -2/3 passing through (-5, -5)

**Algebra**

a line passes through the point (-7,-4) and has a slope of 3 write an equation for this line

**Algebra**

how do you find -4/5 on a graph?

**Algebra**

4x-3y=-6 finding the x and y intercept line based on a equation in standard form

**Algebra parallel and perpendicular**

Thank you. can you explain the steps that you used.

**Algebra parallel and perpendicular**

y=3/4x-1 write equation for a line parallel to the given line passing through (4,0)

**Algebra**

8(v-8)-2v=-28

**Algebra**

0.05(0.3m+35n)-0.8(0.09n-22m)

**Algebra**

It was not -2w it was 2w

**Algebra**

2w-3+3(w-4)-5(w-6)

**Algebra**

-2w-3+3(w-4)-5(w-6)

**algebra 1**

The sum of four consecutive integers is decreased by 30, the result is the fourth integer. Find the four integers.

**english**

what is the complete subject in romans held this festival on february 15

**Phyics**

A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 75.5 m/s2 for 1.58 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) wi...

**Phyics**

A hot-air balloon is rising upward with a constant speed of 4.00 m/s. When the balloon is 4.77 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

**Accounting**

You received an email from Carl the operations manager from the California Container division. They produce packaging for cell phones. Carl understands that his product is an important cash producer for the company. •The delivery price is based on long term contracts. ...

**help with chem biochem **

You have a 1 ml solution containing 100 uM Ethanol, and 1 mM NAD+. You then add 1 mg of alcohol dehydrogenase. Assume all of the ethanol gets converted to acetaldehyde . a) What will the final concentration of NADH be in the solution?

**help with chem biochem**

Ethanol + NAD+ ----> acetaldehyde + NADH + H+

**help with chem biochem **

Ethanol + NAD+ acetaldehyde + NADH + H+ You have a 1 ml solution containing 100 uM Ethanol, and 1 mM NAD+. You then add 1 mg of alcohol dehydrogenase. Assume all of the ethanol gets converted to acetaldehyde. a) What will the final concentration of NA...

**Math**

A 120m cable TV tower casts a 96m shadow. Find the height of a nearby telephone pole that cast a 16m shadow.

**Physics**

An olympic sprinter can run 100yd in 9.0s. At the same rate, how long would it take the sprinter to run 100m?

**Statistics**

They all was wrong on (B).

**Statistics**

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6+.1x (b) Find the ordinates y hat for the points on the line of best fit wh...

**statistic check**

Sorry but that answer is wrong also..

**statistic check**

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.60 is what I got.

**statistics**

I think so

**statistics**

Sorry this is not right

**statistics**

I tried the F test calculator and that does not give me the answers that are needed. I have looked for one for critical region and have been unable to find one at this time.

**statistics**

The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ƒÏ = 0 in favor of ƒÏ ‚ 0 at ...

**math**

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 is what I got.

**math**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì...

**math check**

This will most likely be my last question that I have to post, I wanted to think everyone that has helped me and my friends when we had questions. This is a great site that helps when in need. Again Thank you all!!!!

**math check**

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.6 .

**math check**

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n =...

**Math**

So on B I got the answers, 0.5, 1.5, 2.5,3.5,4.5 And everything that I have tried on C is coming up wrong????

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