Tuesday

March 3, 2015

March 3, 2015

Total # Posts: 2,065

**MATH**

Construct both an ungrouped and a grouped frequency distribution for the data given below: 207 211 204 208 202 203 211 202 205 212 210 212 204 199 204 201 213 200 204 207
*November 11, 2011*

**MATH**

An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. The researchers use videotape to count how many cockroaches are still alive, and how many appear to be in distress, at 10 second intervals. When the ...
*November 11, 2011*

**MATH**

(A) Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: zip codes for the state of Pennsylvania (B) Determine if this data is qualitative or quantitative: Nationality (C) In your own line of...
*November 11, 2011*

**math**

rectangular roof of hospital has width of 80ft, and area of 16,000sq ft. what is length and perimeter of roof
*November 10, 2011*

**Math**

For the table that follows, answer the following questions: x y 1 -8 2 -11 3 -14 4 - Would the correlation between x and y in the table above be positive or negative? - Find the missing value of y in the table. - How would the values of this table be interpreted in terms of ...
*November 10, 2011*

**Math**

Rank the following data in increasing order and find the positions and values of both the 39th percentile and 67th percentile. 5 9 9 0 7 2 5 6 9 1 0 6
*November 10, 2011*

**Math**

The following data lists the average monthly snowfall for January in 15 cities around the US: 42 45 8 18 45 15 31 46 3 33 2 6 32 47 36 Find the mean, variance, and standard deviation.
*November 10, 2011*

**Math**

Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25 37-39 22 40-42 9 43-45 20
*November 10, 2011*

**Math**

Given the following frequency distribution, find the mean, variance, and standard deviation. Class Frequency 31-33 18 34-36 25
*November 10, 2011*

**MATH...PLZ HELP**

Given a level of confidence of 99% and a population standard deviation of 13, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 61. Show all work.
*November 6, 2011*

**Chemistry**

If there is a radiation that has a half life of 10 days and we have it for 110 days, what will be the fraction of radiation left?
*November 6, 2011*

**Physics**

A ball player hits a home run, and the baseball just clears a wall 17.0 m high located 124.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.0 m above the ground. (a) What is...
*November 6, 2011*

**Adverbs and other parts of speech**

which one of the following words phrases if the superlative form of an adjective? A.Less B.Slower C.Most active D.more rapidly
*November 4, 2011*

**chemistry**

Assume that you have 2.10 of the deadly gas hydrogen cyanide, . What is the volume of the gas at STP?
*November 2, 2011*

**General Chemistry**

c3h8+5o2 3co2+4h2o How many kg of propane only is in a 20lb tank?
*October 30, 2011*

**Chemistry**

I got that delta H=-24.4 and delta G=-24.3... But keep getting the equilibrium constant (K) wrong... Can someone please help...
*October 30, 2011*

**Chemistry**

a. Calculate the delta H, delta G, and equilibrium constant for the reaction of methane with Cl2 to give CH3Cl and HCl. Use the following information for your calculations: Bond Dissociation Energies: CH3-H (104.8kcal/mol), Cl-Cl(59.0 kcal/mol), CH3-Cl(85.0 kcal/mol), and H-Cl...
*October 30, 2011*

**math**

give the answer to two decimal places: 89 / 43 =
*October 30, 2011*

**outline writing**

I need help writing an outline for what I have written here. I would like to do my assignment of Microbes, more to the point on how microbes help us. When most people think of microbes they think for bad bacteria or the ugly side of what microbes does. I have been researching ...
*October 30, 2011*

**Microbiology**

I need help writing an outline for what I have written here. I would like to do my assignment of Microbes, more to the point on how microbes help us. When most people think of microbes they think for bad bacteria or the ugly side of what microbes does. I have been researching ...
*October 30, 2011*

**Can u help me Ms. Sue...Stats**

okay thank u
*October 25, 2011*

**Can u help me Ms. Sue...Stats**

oh...its okay...do u know who can help me? no one seems to be helping me :(
*October 25, 2011*

**Can u help me Ms. Sue...Stats**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*October 25, 2011*

**Can u plz help me PsyDag?? Stats**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*October 25, 2011*

**Is this right?? Stats....**

great i wasn't so sure about the last 2 thank you :)
*October 25, 2011*

**Is this right?? Stats....**

Classify the following as discrete or continuous random variables. (A) The time it takes to run a marathon (B) The number of fractions between 1 and 2 (C) A pair of dice is rolled, and the sum to appear on the dice is recorded (D) The length of a broad jump I got: (A) ...
*October 25, 2011*

**Is this right?? Stats....**

How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.20 0.16 0.28 0.24 Would it be 0.12??
*October 25, 2011*

**PLZ help!! Stats....**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*October 25, 2011*

**Stats**

How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.20 0.16 0.28 0.24 Would it be 0.11??
*October 24, 2011*

**Stats**

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least three will have this mild...
*October 24, 2011*

**Stats**

Classify the following as discrete or continuous random variables. (A) The time it takes to run a marathon (B) The number of fractions between 1 and 2 (C) A pair of dice is rolled, and the sum to appear on the dice is recorded (D) The length of a broad jump I got: (A) ...
*October 24, 2011*

**Stats**

A bag of colored blocks contains the following assortment of colors: red (18), blue (14), orange (20), purple (14), green (10), and yellow (4). Construct the probability distribution for x. I'm so lost....
*October 24, 2011*

**PLZ HELP....STATS**

You are given the following data. # of Absences Final Grade 0 96 1 92 2 71 3 66 4 60 5 51 A. Find the correlation coefficient for the data. B. Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
*October 23, 2011*

**NEED HELP PLZ!!! STATS**

Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this experiment is completed...
*October 23, 2011*

**Stats**

USA snapshot presented a bar graph depicting business travelers’ impression of wait times in airport security lines over the past 12 months. Statistics were derived from Travel Industry Association of American Business Traveler Survey of 2034 respondents. Is this a ...
*October 23, 2011*

**Stats**

You are given the following data. # of Absences Final Grade 0 96 1 92 2 71 3 66 4 60 5 51 A. Find the correlation coefficient for the data. B. Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
*October 23, 2011*

**Stats**

Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this experiment is completed...
*October 23, 2011*

**Stats**

Oh....I understand a little better now...thank you!
*October 20, 2011*

**Stats**

The linear correlation coefficient is a numerical value that ranges from -1.00 to +1.00. Describe in a sentence or two the meaning of each of these correlation coefficients: a) -1.00 b) +1.00
*October 20, 2011*

**Statistics**

So they are all probability distributions?
*October 20, 2011*

**Statistics**

USA snapshot presented a bar graph depicting business travelers’ impression of wait times in airport security lines over the past 12 months. Statistics were derived from Travel Industry Association of American Business Traveler Survey of 2034 respondents. Is this a ...
*October 20, 2011*

**Statistics**

The following data lists the average monthly snowfall for January in 15 cities around the US: 29 26 6 46 17 34 15 45 19 43 37 6 9 33 37 Find the mean, variance, and standard deviation.
*October 17, 2011*

**Plz help me Sue!!**

oh....so i get x = 53??
*October 16, 2011*

**Plz help me Sue!!**

Did i do that correctly??
*October 16, 2011*

**Plz help me Sue!!**

81 = (x + 352)/5 81 = 352x/5 81 = 70.4x x = 1.15??
*October 16, 2011*

**Plz help me Sue!!**

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 81, the median is 91, and the mode is 91. How do i do this??
*October 16, 2011*

**Statistics**

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 81, the median is 91, and the mode is 91. How do i do this??
*October 16, 2011*

**Stats....plz help....**

can u plz help me with the other problem i posted? i need help so bad! thank u!!
*October 16, 2011*

**Stats....plz help....**

ok thank u!!
*October 16, 2011*

**Stats....plz help....**

5.04? but how did u come up with multiplying it by 9? because it's the highest number?
*October 16, 2011*

**Stats....plz help....**

001136688999??
*October 16, 2011*

**Stats....plz help....**

Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9 How do i find the position and value of the 56th percentile??
*October 16, 2011*

**Math-confused...plz help**

I. Use Chebyshev’s theorem to find what percent of the values will fall between 183 and 227 for a data set with a mean of 205 and standard deviation of 11. II. Use the Empirical Rule to find what two values 99.7% of the data will fall between for a data set with a mean of...
*October 16, 2011*

**Please tell me if i did this correct**

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25 This is what I got: Mean = 59.19 Variance = 1.43 Standard Deviation = 2.05
*October 16, 2011*

**Stats**

still confused....
*October 15, 2011*

**Stats**

Start with x=75 and add four x values to make a smaple of five data such that the standard deviation of these data equals 0.
*October 15, 2011*

**Stats**

so the SD = 30??
*October 15, 2011*

**Stats**

V = 30^2 = 900??
*October 15, 2011*

**Stats**

A set of 50 data values has a mean of 15 and a variance of 36. Find the standard score of a data value = 30
*October 15, 2011*

**Stats**

001136688999?? How do I find the position and value of the 56th percentile?
*October 15, 2011*

**Stats**

Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9
*October 15, 2011*

**Stats**

yay!! thank u!!
*October 15, 2011*

**Stats**

Z = 64-51/5.0 = 13/5.0 = 2.6 Z = 47-51/5.0 = -4/5.0 = -0.8 Is this correct?
*October 15, 2011*

**Stats**

A Math test has a mean of 51 and standard deviation of 5.0. Find the corresponding z scores for: I. a test score of 64 II. a test score of 47
*October 15, 2011*

**Stats**

okay so the first would be 0.75 correct? the second one would be 3 = -16.46 -3 = -16.46 is this correct?
*October 15, 2011*

**Stats**

1. Z = (s-205)/11 = 205/11 = 18.63??? This one confuses me 2. I have no idea how to do this.... Please help!!
*October 15, 2011*

**Stats**

I. Use Chebyshev’s theorem to find what percent of the values will fall between 183 and 227 for a data set with a mean of 205 and standard deviation of 11. II. Use the Empirical Rule to find what two values 99.7% of the data will fall between for a data set with a mean of...
*October 15, 2011*

**Stats.....plz help me.....**

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25
*October 14, 2011*

**Math**

How are z scores and the "empirical rule" related?
*October 13, 2011*

**Math Help**

looks correct to me
*October 13, 2011*

**Stats**

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25
*October 13, 2011*

**Can someone help me please?**

Statistics confuses me....thank you for your help :)
*October 13, 2011*

**Can someone help me please?**

A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
*October 13, 2011*

**algebra**

3/4 times 11/9 times 90 times 21/90
*October 12, 2011*

**Help plz!! Math....**

hmmmm....this is so confusing for me....
*October 12, 2011*

**Help plz!! Math....**

I apologize...thank you....so is it A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0
*October 12, 2011*

**misin ideas**

regular aerobicise an individual more endurance tha show cause and effect
*October 11, 2011*

**Chemistry **

When a 5.50g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee cup calorimeter, the temperature of rises from 21.6 degrees C to 37.8 degrees C. Calculate Change of heat for the reaction in kJ (also in kJ/mol NaOH) for the solution process. Assume the ...
*October 10, 2011*

**algebra**

Find the length of the golden rectangle whose width is 14.72
*October 9, 2011*

**Fibonacci numbers**

I have been working on this question all day and can not figure out what to do. The question says according to the Quadratic Formula, the solutions of x^2-x-1=0 I know the positive solution is the golden rule ratio and the negative solution is the conjugate of 0(with a slash ...
*October 9, 2011*

**algebra - reply to answer**

why is this a poor model for hitting a baseball? y = -0.002x^2 + 0.879x + 3.981 I know it gets hit at approx. 4 feet high. The -a gives the right shape like a hill. There's a -4.48 and 443.95 zero, which can be hit for distance. The max is (219.75, 100) so that seems ...
*October 9, 2011*

**algebra Please Help**

New question: A baseball was 2.74 feet above ground when it was hit. It reached a max. height of 116.3ft when it was approx 215.3 ft away from where he hit the ball. The ball lands after travelling a ground distance of approx 433.1 ft. Find an equation of form y = A(x-h)^2 + k...
*October 9, 2011*

**algebra**

why is this a poor model for hitting a baseball? y = -0.002x^2 + 0.879x + 3.981 I know it gets hit at approx. 4 feet high. The -a gives the right shape like a hill. There's a -4.48 and 443.95 zero, which can be hit for distance. The max is (219.75, 100) so that seems ...
*October 9, 2011*

**algebra**

Suppose the ball was 2.74 feet above ground when it was hit. It reached a max. height of 116.3ft when it was approx 215.3 ft away from where he hit the ball. The ball lands after travelling a ground distance of approx 433.1 ft. -- find an equation in form of y=C(x-z1)(x-z2) ...
*October 8, 2011*

**Microeconomics**

Baseballs cost $5 and baseball gloves cost $20. Assume you have $100 total to spend on these items. Construct a table similar to the one on page 158. What is the point, based on the Equimarginal Rule, that has equal marginal benefit (or the closest) for the two purchases?
*October 8, 2011*

**Biology**

Can DNA control how many teeth we will have?
*October 6, 2011*

**Fibonacci Numbers**

Thank you Jennifer! I just figured out where I went wrong in wording the problem. a= 2x8=16 b=2x15=30 c=9+25=34 16^2+30^2=34^2 256+900=1156 1156=1156 Thank you for helping to guide me in the right direction. One more problem to go by Friday...I just may be calling on you!
*October 3, 2011*

**Fibonacci Numbers**

I think it is the fibonacci numbers and the wording of the word problem. I thought I had to add 4 and 2 together to get the 6 and then square it. I am just confused. Thanks
*October 3, 2011*

**Fibonacci Numbers**

This is not a test question, but I did not know what the appropriate topic for my question is. If I used the terms 2, 3, 4, 8 consecutive terms of the Fibonacci sequence. "a" is the first and fourth terms and "b" is twice the product of the second and third...
*October 3, 2011*

**biology**

Hi there! I have this question for my bio/genetics homework, and I can't seem to figure it out. It reads, "A true-breeding red snapdragon is crossed to a true-breeding white snapdragon. The F1 progeny are all red. When the F1 is selfed, the following F2 progeny are ...
*October 3, 2011*

**Fibonacci numbers**

I have three problems to answer dealing with Fibonacci numbers. I understand the first two, but would like for reassurrance that they are correct and lost on the last one and could use some help. Thank you. 1. Fibonacci numbers can not be used more than once. Find sums for ...
*October 2, 2011*

**statistics**

For a distribution in which the mean is 100 and the standard deviation is 12, find the following: the percentile of a score of 106.
*September 30, 2011*

**PHYSICS! HELP PLEASE**

start the shopper at (0,0) After pushing the cart 43 m south, he's now at (0, -43) After turning west and pushing the cart 15 m, he's now at (-15, -43) Now he has to turn 90 degrees again. . . he will then be going either north or south. . . south will result in the ...
*September 27, 2011*

**economics**

Looks right to me!
*September 26, 2011*

**Science**

A 73 kg student traveling in acar with a constant velocity has a kinetic energy of 1.3 x 10^4 J. What is the speedometer reading of the car in km/h?
*September 21, 2011*

**business law**

what is the gist of proximate cause? why do courts struggle with its concept?
*September 18, 2011*

**algebra**

p^2+p+4=0
*September 16, 2011*

**physics**

a ball is thrown up with an initial velocity 20m/s. using g=10m/s2, a) what's the maximum height it can reach. b) what is the magnitude and direction of the ball's velocity 1 second after it is thrown. c) what is the magnitude and direction of the ball's velocity 3...
*September 12, 2011*

**nursing evidence**

_ _ _ _ _ _ _ _ _ 1. Information used to conduct our lives _ _ _ _ _ _ _ _ _ 2. To solve a problem by collecting the necessary pieces of information and putting them together _ _ _ _ _ AND _ _ _ _ _ 3. Try several approaches until one works _ _ _ _ _ _ _ _ _ 4. Do what feels ...
*September 12, 2011*

**Chemistry**

It still doesnt make aense because the answer comes out to 240 liters.
*September 11, 2011*

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