Airplane Safety: Suppose that 62% of all adults think that airplanes would be safer places if pilots carried guns. An opinion poll plans to ask an SRS of 1009 adults about airplane safety. The proportion of the sample who think that airplanes would be safer if pilots carried guns will vary if we tak...

1. A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
a. What does "at random" mean?
b. What is the random variable in this experiment?
c. Write the probability model corresponding to this random variable. Expl...

A particular product is known to have an exponential failure time distribution with a mean of 12 months.
a. Find the probability it will fail in less than 9 months.
b. What is the reliability at 15 months?
c. Determine and graph the hazard rate for this product.

1. According to a Gallup Poll conducted March 5-7, 2001, 52% of American adults think that protecting the environment should be given priority over developing US energy supplies, 36% think developing energy supplies is more important, and 6% believe the two are equally important. The rest have no op...

Speedy copy center located on Capitol Hill in Washington D.C. has three coin operated copying machines used primarily by U.S. Senators to make copies of their confidential diaries and illegal agreements with foreign governments and corporations. The owner, Hugh Makeham, is a former Xerox repairman ...

A number of years ago, there was a popular television game show called Let's Make a Deal. The host Monty Hall, would randomly select contestants from the audience and, as the title suggests, he would make deals for prizes. Contestants would be given relatively modest prizes and would then be offered...

An insurance agent has appointments with four prospective clients tomorrow. From past experience, the agent knows that the probability of making a sale on any appointment is 1 out of 5. Using the rules of probablitlity, what is the likelihood that the agent will sell a policy to 3 of the 4 prospecti...

In a management trainee program, 80 percent of the trainees are female, 20 percent male. Ninety percent of the females attended college, 78 percent of the males attended college. a management trainee is selected at random, what is the probability that the person selected is a female who did NOT atte...

The project below involves using a computer simulator to virtually flip multiple coins. First, we'll flip 4 coins 20 times, then we'll flip 4 coins 10000 times.
I have taken screenshots of my results with the coin-flipper (attached) but need some help with the questions.
Questions for flippin...

18. Last year, at Northern Manufacturing Company, 200 people had colds during the year. One hundred fifty-five people who did no exercising had colds, and the remainder of the people with colds were involved in a weekly exercise program. Half of the 1,000 employees were involved in some type of exer...

A number of years ago, there was a popular television game show called Let's Make a Deal. The host, Monty Hall, would randomly select contestants from the audience and, as the title suggests, he would make deals for prizes. Contestants would be given relatively modest prizes and then would be offere...

Suppose you have a coin and you want to test two hypotheses: H0: the coin is fair (that is, you get a head with probability p = 0.5 and a tail with the same) and H1: the coin is unfair and has probability p > 05 for a head and (1-p) for a tail. Assume p is known.
Explain in detail what the optim...

The accounting department at Weston Materials Inc a national manufacturer of unattached garages, report that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model. Assume the assembly times follow the normal distribution.
a. Determin...

EBook is a digital book provider that sells their downloaded product through both Anason and Bairnes-Nolb. Anason requires that EBook use a different format than they use for Bairnes-Nolb. EBook keeps records that show the number of unacceptable downloads done by each format. Based on past data, th...

According to the U.S. Census Bureau, the mean household income in the United States in 2000 was $63,091 and the median household income was $50,054 (U.S. Census Bureau, www.census.gov, September 2011). The variability of household income is quite large, with the 85th percentile (i.e., top 15%) appr...

Currently, quarters have weights that are normally distributed with a mean of 5.670 g and a standard deviation of 0.062 g. A vending machine is configured to accept only those quarters with weights between 5.550 g and 5.790 g.
a) If 280 different quarters are inserted into the vending machine, w...

A Boeing 767-300 has 213 seats. When someone buys a ticket for a flight, there is a 0.0995 chance that the person will not show up for the flight (based on data from an IBM research paper by Lawrence, Hong, and Cherrier). A ticket agent accepts 236 reservations for a flight that uses a Boeing 767-3...

A standard slot machine has three reels. The first reel has 3 walnuts, 7 cherries, 3 oranges, 5 lemons, 1 bell, and 1 jackpot bar. The second reel has 7 cherries, 6 oranges, 1 lemon, 3 bells, and 3 bars. The third reel has 4 walnuts, 7 oranges, 5 lemons, 3 bells and 1 bar. The payoffs are
Reel...

Please discuss if reliability and/or validity are mutually exclusive, mutually dependent, etc. Provide an example that clearly identifies your position.

W1A4 Sample Questions
Determine if this is an example of probability or statistics:
If a red, blue, and green M&M are placed into a bag, we have a 1/3 chance of reaching in and selecting the red M&M.
Determine if this data is qualitative or quantitative:
Waist size
Determine if this study is ex...

The incomplete table at right is a discrete random variable x's probability distribution, where x is the number of courses taken by randomly selected undergraduate student. (Please refer to attached document to view the table and note that the questions are written in the excel file as well ) Answer...

a. In a class roster of 18 students, what are the chances that there are at least 2 people with the same birthday (same day, not same year)? Given a birthday of July 29th, please provide a detailed analytical estimate of the likelihood that this will happen.
b. A street performer approaches you ...

Define probability distributions. Describe two common probability distributions.
Looking for a good original (yet cited) response to this definition. And if you can describe two common ones with an example for each that would be great.

1. True or False? The normal distribution is the most important discrete probability distribution.
2. True or False? Every normal distribution can be transformed to a standard normal
distribution.
3. For a standard normal distribution, what is the value of the standard deviation and the mean?
4....

Please see the attached case study.
What is the problem facing Sam Ellis and Forward Software? (This may take 2-3 paragraphs to explain properly). Based on your decision tree, what is the course of action Sam Ellis and Forward Software should take based on the lowest EMV? (That is, what is the lo...

Assume that a single radar unit used to detect incoming missiles has a probability of 0.90 of correctly detecting an incoming missile attack. Furthermore, assume that four such individual and identical radar units (each with an individual probability of 0.90 of detecting an incoming missile attack) ...

The time between arrivals of customers at the drive-up window of a bank follows an exponential probability distribution with a mean of 10 minutes.
a. What is the probability that the arrival time between customers will be 7 minutes or less?
b. What is the probability that the arrival time between ...

The time it takes to hand carve a guitar neck is uniformly distributed between 110 and 190 minutes.
a. What is the probability that a guitar neck can be carved between 95 and 165 minutes?
b. What is the probability that the guitar neck can be carved between 120 and 200 minutes?
c. Determine the...

There are 2 types of probability: empirical and theoretical (classical).
- Define the 2 probability types in your own words.
- List 1 profession example for each probability type: empirical probability and theoretical (classical) probability. Explain clearly how these probabilities are used.
-...