josh214

The Democrat and Chronicle reported that 25% of the flights arriving at the San Diego airport during the first five months of 2001 were late (Democrat and Chronicle, July 23, 2001). Assume the population proportion is p = .25.

Calculate σ( p¯) with a sample size of 1,000 flights (to 4 decimals).

What is the probability that the sample proportion will be within +/- .03 of the population proportion if a sample of size 1,000 is selected (to 4 decimals)?

What is the probability that the sample proportion will be within +/- .03 of the population proportion if a sample of size 500 is selected (to 4 decimals)?

In an article about the cost of health care, Money magazine reported that a visit to a hospital emergency room for something as simple as a sore throat has a mean cost of $328 (Money, January 2009). Assume that the cost for this type of hospital emergency room visit is normally distributed with a standard deviation of $92. Answer the following questions about the cost of a hospital emergency room visit for this medical service.

What is the probability that the cost will be more than $500? (to 4 decimals)

______

What is the probability that the cost will be less than $250? (to 4 decimals)

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What is the probability that the cost will be between $300 and $400? (in inches, to 4 decimals)

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If the cost to a patient is in the lower 8% of charges for this medical service, what was the cost of this patient’s emergency room visit? (to 2 decimals)

$ ______

The time between arrivals of vehicles at a particular intersection follows an exponential probability distribution with a mean of 14 seconds.

What is the probability that the arrival time between vehicles is 12 seconds or less (to 4 decimals)?

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What is the probability that the arrival time between vehicles is 6 seconds or less (to 4 decimals)?

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What is the probability of 30 or more seconds between vehicle arrivals (to 4 decimals)?

A person must score in the upper 2% of the population on an IQ test to qualify for membership in Mensa, the international high-IQ society (US Airways Attache, September 2000).

If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15, what score must a person have to qualify for Mensa (to the nearest whole number)?

_______

The driving distance for the top 100 golfers on the PGA tour is between 284.7 and 310.6 yards ( Golfweek , March 29, 2003). Assume that the driving distance for these golfers is uniformly distributed over this interval.

What is the probability the driving distance for one of these golfers is less than 290 yards (to 4 decimals)?

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What is the probability the driving distance for one of these golfers is at least 300 yards (to 4 decimals)?

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What is the probability the driving distance for one of these golfers is between 290 and 305 yards (to 4 decimals)?

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How many of the 100 golfers drive the ball at least 290 yards?

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A university found that 30% of its students withdraw without completing the introductory statistics course. Assume that 20 students registered for the course.

Compute the probability that two or fewer will withdraw (to 4 decimals).

Compute the probability that exactly four will withdraw (to 4 decimals).

Compute the probability that more than three will withdraw (to 4 decimals).

Compute the expected number of withdrawals.

Twenty-three percent of automobiles are not covered by insurance (CNN, February 23, 2006). On a particular weekend, 35 automobiles are involved in traffic accidents.

What is the expected number of these automobiles that are not covered by insurance (to the nearest whole number)?

i figured out that this is 8 but i dont know what numbers to use to answer the next two questions...

What is the variance and standard deviation (to 2 decimals)?

During the period of time that a local university takes phone-in registrations, calls come in at the rate of one every two minutes.

What is the expected number of calls in one hour?

What is the probability of three calls in five minutes (to 4 decimals)?

What is the probability of no calls in a five-minute period (to 4 decimals)?

In San Francisco, 30% of workers take public transportation daily (USA Today, December 21,2005).

In a sample of 10 workers, what is the probability that exactly three workers take public transportation daily (to 4 decimals)?

In a sample of 10 workers, what is the probability that at least three workers take public transportation daily (to 4 decimals)?

i have this by pass kit right here http://cgi.ebay.com/PIONEER-DVD-BRAKE-BYPASS-HACK-...

i just need to know which wires to hook up with what.. i have the ground and the green one i just cant seem to figure out where the blue one goes..any one know??

i wanna have them to wear they turn on when the car is in park...i've seen it done before...anyone know how u have to wire them to do that???

i have two kicker 12s cvr and i need an amp i know someone selling a kicker 800 watt amp with 2 channels..is that right?? will it work

i got a set of clubs and they are a 1" over standard if i cut that inch off will it mess with the club in anyway...they are dynamic gold steel shafts...

I believe that kids should be involved in sports. Sports help kids stay fit, gain social skills, and learn teamwork.

i need some ideas about what else to put in the intro for this...

i know he is callaway but i am talking about his loft??? i chip mainly with a 56 but am thinking of going to a 60 ppl say that is wrong and i shouldnt do that that i should just stick with the 56...

i am wanting to play college golf next year and really like the new ap2s but what i was wondering is will i be able to play those in college tournaments... i read the summary on it but i don't understand it.. it said pros would have to switch next year with top amateur events following for 2014 but i don't know what it would be for college...someone plz explain this to me....

any one know what the sizes range from for these hats like small-medium ranges from what to what medium large what to what and large eaxtra large whats to what??? if any one has one of these hats tell me what size fitted cap u wear and what size u ended up getting for this one??

heres the link incase u dont know which hat im talking bout

http://www.golfsmith.com/products/294901/Titleist/...

i have a 10.5 nike with the v2 shaft stiff..i feel like for one it weighs more than 66g and that i dont hit it as far as i use to with my old sasquatch with a nv stiff shaft 65g...any one else ever heard of this..???

i play all types of courses some wit hard sand some with fluffy fluffy sand what is a good bounce to get for a wedge that i can use just about any course...i'm looking for a 56 recently lost mine it was a nike sv and its bounce was 10 i felt like i didnt hit it as far as my old volkey can bounce affect distance

need a brake tag and i was wondering if any one knows where i can get one that doesnt care about my tint....also do i have to get it in new orleans or any where in the state