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Plot the survival curve for males and for females. Briefly describe any differences or trends.
A bag contains 40 blue marbles, 40 red marbles, and 20 green marbles. 60 of the marbles are big. These marbles are selected at random without replacement
It's estimated that 57% of Americans live in households with 1 or 2 people, 32% live in households with 3 or 4 people and 11% live in households
Shaquille O'Neal is not recognized as good free throw shooter. Career average is 0.532 (53.2%). Suppose in a game Shaq takes 5 free throws.
One of the ways most Americans relieve stress is to reward themselves with sweets. According to one study, 46% admit to overeating sweet foods when stressed
Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability
A chef in a restaurant takes three rice dishes at random, without replacement, from a freezer. The freezer contains 4 fried rice dishes and 3 boiled rice dishes
In 1992, the Big 10 collegiate sports conference moved to have women compose at least 40% of its athletes within 5 years
If a person adopts a pet there is a 45% it'll be a cat and 55% it will be a dog (a local dog and cat adoption). If a cat is adopted there is 60% chance
A fire station is to be located along a road of length A, A<8. If fires will occur at points uniformly chosen of (0, A), where should the station
If a particular batch of data is approximately normally distributed, we would find that approximately:
A professor grades homework by randomly choosing 5 out of 12 homework problems to grade.
Suppose that you are working for an energy company that distributes natural gas to residents in a city.
Records show that 30% of all patients admitted to a medical clinic fail to pay their bills and that eventually the bills are forgiven.
A shipping company knows that the cost of delivering a small package within 24 hours is $14.80.
If x has a binomial distribution with p = .5, will the shape of the probability distribution be symmetric, skewed to the left, or skewed to the right?
The goal at U.S. airports handling international flights is to clear these flights within 45 minutes. Let's interpret this to mean that 95 percent of the flight
The number of construction projects on a college campus follows Poissan's dist. with a mean=3. The probability that exactly two projects are currently
A rock crushing company has 3 plants, all receiving blasted rock in bulk. The amount of rock that can be crushed by one of the plants in one day
Suppose X1 and X2 are independent exp. random variables, each with mean data and y=X1 and X2. What is the moment generating function for the random variable y?
A fair coin is tossed 3 times. Let X be the number of heads on the third tossing and let Y be the total number of heads.
The density function of a continuous variable x is given by
A normal distribution has a mean of 50 and a standard deviation of 4.
A woman has n keys, of which one will open her door. (a) if she tries the keys at random, discarding those that do not work, what is the probability
If it is assumed that all (52 5) poker hands are equally likely, what is the probability of being dealt