
Statistics
The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bellshaped distribution. The arithmetic mean is 11.0 inches, and the standard deviation is 2.0 inches. About 68 percent of the outside diameters lie between
asked by Shawn on March 27, 2014 
Stats
The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard deviation of 0.05 mm.
asked by Matt on November 28, 2012 
pvc and wool
If you rub a piece of PVC pipe with some wool and touch the PVC to Aluminum foil. Will the PVC be charged after rubbing it with wool?? Will the aluminum be charged? Finally can the PVC cause the aluminum to move. Please explain (hint: can the PVC give
asked by kaylee on January 13, 2009 
physics
If you rub a piece of PVC pipe with some wool and touch the PVC to Aluminum foil. Will the PVC be charged after rubbing it with wool?? Will the aluminum be charged? Finally can the PVC cause the aluminum to move. Please explain (hint: can the PVC give
asked by kaylee on January 13, 2009 
pvc aluminum charge
If you rub a piece of PVC pipe with some wool and touch the PVC to Aluminum foil. Will the PVC be charged after rubbing it with wool?? Will the aluminum be charged? Finally can the PVC cause the aluminum to move. Please explain (hint: can the PVC give
asked by kaylee on January 13, 2009 
Statistics
Find an example of application of Normal Distribution (or approximately Normal Distribution) in your workplace or business (or any other business that you are familiar with). Prove that the variable has the characteristics of a Normal Distribution. Recall
asked by Kathy on October 8, 2010 
Physics (Center of Gravity)
In a lab in my physics class, we were supposed to find the CG of my physics teacher. My partner and I had him lie flat on a wooden (assumed uniform) board that was resting on top of two PVC pipes at either end. Since the PVC pipes acted as the base of
asked by Brittany on May 10, 2010 
res342
In conducting research that looks at differences in populations, samples are used for numerous reasons. Using entire populations in a test is difficult, so various sampling techniques are applied. In situations in which the population variance is unknown,
asked by jack on May 14, 2011 
stat
Which of the following statements is true about the tdistribution with k degrees of freedom? i. the tdistribution is symmetric ii. the tdistribution with k degrees of freedom has a smaller variance than the tdistribution with k+1 degrees of freedom
asked by Anonymous on May 2, 2007 
Math
Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 6, Q1 at 7.5, median at 8, Q3 at 23, max at 32.5 The mean, because the data distribution is symmetrical The median, because the data
asked by help on May 1, 2016 
Probability/Distribution
A catalyst researcher states that the diameters (in microns) of the pores in a new product catalyst she has made have an exponential distribution with parameter ë = 0.25 (35 pts). (a) Determine the mean pore size. (b) Determine the standard deviation of
asked by Erica on October 11, 2016 
stats
(a) The test had six multiplechoice items that were scored as correct or incorrect, so the total score was an integer between 0 and 6. Do you think that these data are Normally distributed? Explain why or why not. The distribution is Normal because the
asked by Anonymous on September 26, 2016 
stats
(a) The test had six multiplechoice items that were scored as correct or incorrect, so the total score was an integer between 0 and 6. Do you think that these data are Normally distributed? Explain why or why not. The distribution is Normal because the
asked by Anonymous on September 26, 2016 
stats
The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard deviation of 0.05 mm.
asked by johnny on November 27, 2012 
Statistics
The following is a histogram (right skewed) of the first ten terms of a geometric distribution with p = .4. The mean of this distribution is 2.5 and the standard deviation is approximately 1.93. What's the shape of the distribution of sample means for
asked by Jim on February 18, 2016 
Math (Statistic)
Considered the sampling distribution of a sample mean obtained by random sampling from an infinite population. This population has a distribution that is highly skewed toward the larger values. a) How is the mean of the sampling distribution related to the
asked by Jennifer on February 19, 2007 
math300
Run the simulation using n = 30 and N = 10 for a uniform, a bellshaped, and a skewed distribution. Identify the mean of the sampling distribution of sample means for each distribution. Evaluate if the results are what you expected for each distribution.
asked by Karen on February 6, 2011 
algebra
the second finished teepee is 12 feet tall and use PVC pipes that are 13 feet long. what is the distance across the bottom of the teepee? show your work and state your answer as a complete sentence.
asked by kay on January 12, 2012 
statistics
Run the simulation using n = 30 and N = 10 for a uniform, a bellshaped, and a skewed distribution. § Identify the mean of the sampling distribution of sample means for each distribution. § Evaluate if the results are what you expected for each
asked by ray on January 28, 2011 
algebra2/ trig
The figure at the right shows three circular pipes all with 12inch diameters the have been strapped together by a metal band.What is the lenght of the band? I don't even know where to start , please help?
asked by Amber on October 1, 2014 
Stats
When making a decision on whether a sample mean is significantly different than a population mean given that you sampled a small sample (n), what is the correct reasoning for choosing the tdistribution over the standard normal distribution
asked by Plzz help on November 5, 2016 
Statistics
A manufacturer has designed a process to produce pipes that are 10 feet long. The distribution of the pipe length, however, is actually Uniform on the interval 10 feet to 10.85 feet. Assume that the lengths of individual pipes produced by the process are
asked by Hannah on March 5, 2011 
Math Statistics
A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10. * a. This sample of 36 has a mean value of , which belongs to a sampling distribution. Find the shape of this sampling distribution. *
asked by Tammy on February 8, 2011 
college
Using PVC Pipes for building a teepee and I nees to know, how to figure out how long the pieces should be for 12 feet across and 8 feet tall to build this teepee in my yard?
asked by Anonymous on November 1, 2010 
Bcc
suppose x has a moundshaped distribution. A random sample size 16 has a sample mean of 10 and a sample standard deviation of 2. Find 99% cinfidence interval for mue (mean) using a student's t distribution.
asked by Yira f on December 4, 2014 
Math
Find the 95% confidence interval for the standard deviation of the lengths of pipes if a sample of 26 pipes has a standard deviation of 10 inches
asked by Anonymous on August 3, 2012 
Stats
A random sample of dates taken from headstones at a cemetery in Pleasanton, California, showed an average lifespan of 70 years with a standard deviation of 20 years. Assuming the distribution is unimodal, which of the following is most likely a good
asked by Anonymous on October 9, 2011 
Statistics
A random sample of dates taken from headstones at a cemetery in Pleasanton, California, showed an average lifespan of 70 years with a standard deviation of 20 years. Assuming the distribution is unimodal, which of the following is most likely a good
asked by Anonymous on October 9, 2011 
Physics
A sealed container of volume 0.10 m3 holds a sample of 3.0 x 10^24 atoms of helium gas in equilibrium. The distribution of speeds of helium atoms shows a peak at 1100 ms1. Caluculate the temperature and pressure of the helium gas. (helium atom 4.0 amu)
asked by Oli on May 19, 2008 
chemistry
1)A sample of CO2 gas which weighs 0.85 grams has a volume of 1.30 liters when collected at 30°C. What would be the pressure of the gas sample? 2) A gas sample has an original volume of 600 ml when collected at 720 mm and 35°C. If a change is made in the
asked by Anonymous on April 22, 2014 
MTH233/statistics UOP
A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon. You believe the claim is incorrect and find that a random sample of five cars has a mean gas mileage of 19 miles per gallon and a standard deviation of 4
asked by sue on July 27, 2010 
Statistics
When a distribution is moundshaped symmetrical, what is the general relationship among the values of the mean, median, and mode?
asked by Jr on February 3, 2012 
statisticsplease please help
A) Choose one of the following distributions (positively skewed normal distribution, negatively skewed normal distribution or bimodal normal distribution) and generate a sample of 20 numbers for it. The sample you generate should have a mean of 8 and a
asked by Lauren on October 7, 2008 
Statistics
Kind attention Psydag: A random sample of size 20 from a normal population with sample mean 42 and sample standard deviation of 6 . To test the hypothesis the population mean 44 at 5% level of significance , find the pvalue and comment Clarification: The
asked by Mrs. Lakshmi on January 1, 2010 
statistics
Miles per gallon. In its Fuel Economy Guide for 2008 model vehicles, the Environmental Protection Agency gives data on 1152 vehicles. There are a number of outliers, mainly vehicles with very poor gas mileage. If we ignore the outliers, however, the
asked by MAC on September 21, 2011 
Psychology
For an IQ test, we know the population _ 5 100 and the _X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean
asked by Joy on February 2, 2014 
Statistics
For an IQ test, we know the population n=100 and the ox = 16. We are interested in creating the sampling distribution when N = 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean of
asked by Tonya on February 3, 2014 
PSY
For an IQ test, we know the population _ 5 100 and the _X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean
asked by Joy on February 2, 2014 
Statistics
Please help me with this question: For an IQ test, we know the population 5 100 and the X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the
asked by Tonya on February 2, 2014 
statistics
Suppose X has a moundshaped distribution with sigma=9. A random sample of size 36 has a sample mean 20. Is it appropriate to use a normal distribution to compute a confidence interval for the population mean u?
asked by Tracey on June 5, 2012 
precalculus
Move point (3,50 degrees) according to the following symmetries (keep positive) a. symmetrical to the origin b. symmetrical to theta=0 degrees c. symmetrical to theta= 90 degrees
asked by Don on June 2, 2013 
statistics
450 people are randomly selected at grocery stores across the state and surveyed on the amount of money they are spending at the store that day. How does finding the sample variance compare to investigating the sampling distribution of the variance? A. The
asked by maczindahouse on February 20, 2019 
stat
the average number of pushups a United States Marine does daily is 300, with a standard deviation of 50. A random sample of 36 marines is selected. What is the probability that the sample mean is at most 320 pushups? With a mean of 300, you are looking
asked by Anonymous on April 15, 2007 
Statistics
Run the simulation using n = 3= and n=10 for a uniform, a bellshaped, and a skewed distribution. Identify the mean of the sampling distribution of sample means for each distribution
asked by Bose on January 31, 2011 
math
water flows into a reservoir at 2000l/min. the depth of the reservoir is to be kept constant by installing some discharge pipes 1m below the surface of water in the reservoir and diameter of the pipes are 25mm. calculate the number of pipes needed. I tried
asked by linda on September 27, 2016 
statistics
A new extendedlife light bulb has an average service life of 750 hours, with a standard deviation of 50 hours. If the service life of these light bulbs approximates a normal distribution, about what percent of the distribution will be between 600 hours
asked by MARIA on January 9, 2012 
STATISTICS HELP!!!!!!!
Statistical Abstracts (117th edition) reports sale price of unleaded gasoline (in cents per gallon) at the refinery. The distribution is moundshaped with mean μ = 80.04 cents per gallon and standard deviation, σ = 4.74 cents per gallon. (a) Are we
asked by Amy on August 10, 2011 
Statistics
Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled
asked by Anonymous on August 2, 2011 
Statistics/probability/maths
Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled
asked by evangeline johnny on August 2, 2011 
maths
The lifetime in hours of a certain make of batteries follows a normal distribution with mean 160 and standard deviation 30. Calculate the interval, symmetrical about the mean within which 75% of the battery lifetimes lie.
asked by harish on February 13, 2013 
Physics
A sealed container of volume V =0 .10m^3 holds a sample of N =3 .0×10^24 atoms of helium gas in equilibrium. The distribution of speeds of the helium atoms shows a peak at 1.1×10^3 ms^−1. (i) Calculate the temperature and pressure of the helium gas.
asked by Anon on March 20, 2018 
College statistics
Statistical Abstracts (117th edition) reports sale price of unleaded gasoline (in cents per gallon) at the refinery. The distribution is moundshaped with mean μ = 80.04 cents per gallon and standard deviation, σ = 4.74 cents per gallon. (a) Are we
asked by Amy on August 10, 2011 
statistics
Statistical Abstracts (117th edition) reports sale price of unleaded gasoline (in cents per gallon) at the refinery. The distribution is moundshaped with mean μ = 80.04 cents per gallon and standard deviation, σ = 4.74 cents per gallon. (a) Are we
asked by Joy on August 10, 2011 
maths help
What is the least number of rolls should a fair standard 6sided die be done so that the recorded numbers that have been shown approximates a binomial distribution of standard deviation of 10 and a success occurs when a 4 is tossed?
asked by wqa on September 24, 2016 
Chemistry
a sample of helium gas is in a closed system with a movable piston. the volume of the gas sample is changed when both the temperature and the pressure of the sample are increased. the table below shows the initial temperature, pressure, and volume of the
asked by Shanee on April 19, 2011 
Chemistry
A sample of methane (CH4) gas contains a small amount of helium. Calculate the volume percentage of helium if the density of the sample is 0.70902 g/L t 273K and 1.00 atm. I know that the sample is at STP and that the 1 mole of gas under these conditions
asked by Chris on October 29, 2014 
Stats
The distribution of lifetimes for a particular brand of lightbulbs has a mean of 110 hours and a standard deviation of 20 hours. Suppose a random sample of 35 lightbulbs is taken for observation. What is the probability that the sample mean lifetime will
asked by Ryan on January 31, 2011 
Maths
The diameter of a ball bearing is to have an average of 2.0 Cm. A random sample of 10 bearings is selected every hour to check the diameters. The sample selected at 9 a.m. gave the following measurements: 2.02, 2.04, 2.00, 1.98, 1.98, 2.04, 2.04, 2.00,
asked by Naveen on December 9, 2011 
SchoolCraft
A gas sample undergoes a reversible isothermal expansion. The figure gives the change ΔS in entropy of the gas versus the final volume Vf of the gas. The scale of the vertical axis is set by ΔSs = 68.4 J/K. How many moles are in the sample?
asked by Anonymous on June 1, 2016 
Physics
A sample of 8.02×10^−1 moles of nitrogen gas (γ =1 .40) occupies a volume of 2.00×10^−2 m^3 at a pressure of 1.00×10^5 Pa and temperature of 300K. The sample is isothermally compressed to exactly half its original volume. Nitrogen behaves as an
asked by Anon on March 20, 2018 
Statistics
You are interested in estimating the mean of a population. you plan to take a random sample from the population and use the samples mean as an estimate of population mean. Assuming that the population from which you select your sample is normal, which of
asked by Winston on October 25, 2016 
statistics
For a normal distribution (symmetrical), a value that is two standard deviations below the mean would be closer to which of the following? Select one: a. 89th percentile b. Third Quartile c. Third percentile d. Median
asked by Anonymous on October 25, 2014 
Maths
3 inlet pipes A,B and C can be used to fill 1000m^3 water storage tank . When 3 pipes are in operation,the tank can be filled in 10hours .When only pipes A and B are used,the time increases to 20 hours. With pipe A and C, the tank can be filled in 12.5
asked by Rainie on July 26, 2015 
statistics
In this unit we have worked with scores and their locations within a distribution. This discussion is designed to get you to think a little more about distributions of scores. Shown below are two samples of scores. Input these scores into SPSS and use
asked by john on February 26, 2012 
statistics
For an IQ test, we know the population mean = 100 and the standard deviation =16. We are interested in creating the sampling distribution when N = 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ
asked by amanda on March 6, 2015 
Fluid Mechanics
Water flows into a cylindrical tank through pipe 1 at a rate of 25 ft/s and leaves through pipe 2 at 10 ft/s and through pipe 3 at 12 ft/s. Pipe 4 is an open air vent. Internal diameters of the pipes are: D1=3 in, D2= 2 in, D3=2.5 in, D4=2 in. Calculate a)
asked by Katy on September 10, 2013 
Math(Please check! Thank You)
List the intercepts and test for symmetry. y^2  x  4 = 0 I got (4,0) and (0,2) for the intercepts. y^2  x  4 = 0 Is not symmetrical to the x axis, correct? y^2(x)  4 = 0 Is not symmetrical to the y axis, correct? y^2 + x  4 = 0 Is not
asked by Hannah on October 5, 2010 
Math(Please check)
Lsit the intercepts and test for symmetry. y^2  x  4 = 0 I got (4,0) and (0,2) for the intercepts. y^2  x  4 = 0 Is not symmetrical to the x axis, correct? y^2(x)  4 = 0 Is not symmetrical to the y axis, correct? y^2 + x  4 = 0 Is not
asked by Hannah on October 5, 2010 
statistics
The scores of students on the ACT college entrance examination in a recent year had a normal distribution with a mean of 18.6 and a standard deviation of 5.9. A simple random sample of 50 students who took the exam is selected for study: A) What is the
asked by Marshall on November 6, 2008 
Algebra
There is a water tank with a drain of an unknown size that is always open. There is a series of input pipes above it which are all the same size. When 4 pipes are on, it takes 6 hours to fill. When 3 pipes are on, it takes 10 hours to fill. How many pipes
asked by Jimmy on June 26, 2012 
Stats
A new extendedlife light bulb has an average service life of 750 hours, with a standard deviation of 50 hours. If the service life of these light bulbs approximates a normal distribution, about what percent of the distribution will be between 600 and 900
asked by Stephanie F on December 13, 2011 
statistics
A distribution of values follows a N(140,22) distribution. From this distribution you are drawing samples of size 12. Find the interval containing the middlemost 34% of the sample means. Round your values to 1 decimal place.
asked by Kim on October 27, 2011 
Statistics
1. The scores of students on the ACT college entrance examination in a recent year had a normal distribution with a mean of 18.6 and a standard deviation of 5.9. A simple random sample of 60 students who took the exam is selected for study: a) What is the
asked by Tasha on March 25, 2011 
chemistry
a sample containing 1.50 mol neon gas has a volume of 8.00L.what is the new volume of the gas in liters when the following changes occur in the quantity of the gas at constant pressure and temperature? a.a leak allows onhalf of the neon atoms to escape.
asked by Jetta on June 27, 2010 
art
What does symmetrical balance means http://www.google.com/search?hl=en&rls=com.microsoft%3Aenus%3AIESearchBox&rlz=1I7SUNA&q=symmetrical+balance Lots of good information in here. =)
asked by Espoir Simbenga on February 10, 2007 
Statistics
Suppose X1;X2;...;X5 is a random sample from a n(0; variance) distribution. define U = X1+X2+X3+X4; V = (X2)^2+(X3)^2+(X4)^2+(X5)^2 and W = U/sqrtV. (a) Name the distribution of U/4 and V/(variance) and give the values of their parameters. (b) (i) Compute
asked by ruth on August 10, 2006 
Math
A customer want to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee. The teepee is to be 12ft. accross and 8ft tall. How long should the pieces of PVC plumbing pipe be?
asked by Rmz on October 5, 2009 
Chemistry
A 0.642 g sample of an unknown gas was collected over water at 25 C and 1.04 atm. The collection cylinder contained 151.3 mL of gas after the sample was released. Find the molar mass of the unknown gas?
asked by Anonymous on April 27, 2015 
Math check
A random sample of size 26 is to be selected from a population that has a mean ì = 46 and a standard deviation ó of 15. (a) This sample of 26 has a mean value of x, which belongs to a sampling distribution. Find the shape of this sampling distribution.
asked by Sue 76 on June 17, 2013 
Chemistry
a .72g sample of polyvinyl chloride is dissolved in 250.0ml of a suitable solvent at 25C. the solution has an osmotic pressure of 1.67mmHg.What is the molar mass of the PVC?
asked by emerald on February 4, 2011 
Bosaso
If a random sample of size 15 is selected from a symmetrical population with a unique mode, the degrees of freedom of the observation is
asked by xalane on January 6, 2015 
chemistry
a 12.5 g sample of oxygen gas is added to a 25.og sample of nitrogen gas in a 25.0L'Container at 28 C. Calculate the partial pressure of each gas and the total pressure of he mixture. answer
asked by Anonymous on January 9, 2013 
Chemistry
Two natural gas storage tanks, with volumes of 1.5 x 104 and 2.2 x 104L, are at the same temperature. The tanks are connected by pipes that equalize their pressures. What fraction of the stored natural gas is in the larger tank? I have no idea how to go
asked by Michael on May 17, 2010 
statistics
Assume that we collect a large (n>30) simple random sample of annual incomes of adults in the United States. Because the sample is large, can we approximate the distribution of those incomes with a normal distribution ? Why or why not?
asked by Anonymous on March 6, 2013 
business statistics
This select group has been asked to consider the Colorado City Convention and Visitors Bureau survey of 25 hotels in the local area. The survey is concerned with the current availability of rooms. The availability of the rooms was as follows: 90, 72, 75,
asked by taabbie on April 27, 2012 
statistics
A statistics professor receives an average of five email messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have five messages?
asked by Suphaluck on April 6, 2010 
Chemistry
Nanotubes are rolled up cylinders of graphite with diameters of about 1nanometer, and lengths in micrometers. (I) If a nanotube is 5 micrometers long, how many diameters does this represent?
asked by CJ on March 31, 2015 
statistics
An SRS of size n is taken from a large population whose distribution of income is extremely rightskewed and the mean income is calculated. Which of the following statements is false? a) When n > 30, the sampling distribution of is approximately normal. b)
asked by Anna on April 17, 2012 
Stat
An SRS of size n is taken from a large population whose distribution of income is extremely rightskewed and the mean income is calculated. Which of the following statements is false? a) When n > 30, the sampling distribution of is approximately normal. b)
asked by Sam on May 6, 2016 
Physics
The 3.0 cmdiameter water line splits into two 1.0cmdiameter pipes. All pipes are circular and at the same elevation. At point A, the water speed is 2.0m/s and the gauge pressure is 50kPa. What is the gauge pressure at point B?(pointing toward one of the
asked by ana on November 17, 2009 
statistics
random sample of n = 16 scores is selected from a normal distribution with a mean of μ = 50 and standard deviation of σ = 10. a. what is the probability that the sample mean will have a value between 45 and 55? b. what is the probability that the sample
asked by angela on October 15, 2012 
math
Q:The table below shows a distribution and the observed frequencies of the values of a variable from a simple random sample of a population. Perform a chisquare goodnessoffit test, at the specified significance level, to decide whether the distribution
asked by destiny on December 4, 2011 
Statistics
A population =100 and sd=25. A sample (n=150) has X=102. Using 2 tails of the sampling distribution and the .05 criterion. What is the critical value? Is the sample in the region of rejection? What does this indicate about the likelihood of this sample
asked by Pam on February 4, 2016 
statistics
One method for estimating the availability of office space in large cities is to conduct a random sample of offices, and calculate the proportion of offices currently being used. Suppose that real estate agents believe that of all offices are currently
asked by tea on March 26, 2012 
math
can you please try to help me understand this? Q:The table below shows a distribution and the observed frequencies of the values of a variable from a simple random sample of a population. Perform a chisquare goodnessoffit test, at the specified
asked by destiny on December 4, 2011 
Stastics
Suppose cars arrive at Burger King's drivethrough at the rate of 20 cars every hour between 12:00 noon and 1:00 pm. A random sample of 40 onehour periods between 12:00 noon and 1:00 pm is selected and has 22.1 as the sample mean number of cars arriving.
asked by Emma on October 22, 2011 
statistics
Suppose x has a normal distribution with mean μ = 35 and standard deviation σ = 9. (a) Describe the distribution of x values for sample size n = 4. (Use 2 decimal places.) μx = σx = (b) Describe the distribution of x values for sample size n = 16. (Use
asked by larae on February 18, 2014 
Statistics
Suppose cars arrive at Burger King's drivethrough at the rate of 20 cars every hour between 12:00 noon and 1:00 pm. A random sample of 40 onehour periods between 12:00 noon and 1:00 pm is selected and has 22.1 as the sample mean number of cars arriving.
asked by Jake on October 22, 2011 
statistics
10. A random sample of n=36 scores is selected from a normal distribution with a mean of u=60. After a treatment is administered to the individuals in the sample, the sample mean is found to be M=52.
asked by Anonymous on April 5, 2011 
Math
I am having trouble understanding this problem. Please help. A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8
asked by Anonymous on April 13, 2008