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Suppose that you invest the entire $200,000 in one stock. Find the probability that the prot will be more than $16,000.
An elevator in the APM building can carry about 20 people with a total weight of 3000 lbs. Suppose that the average weight of the campus community is 150 lbs with a standard deviation of 55 lbs.
Classify each scenario as one of the following sampling methods: Voluntary Response, Simple Random Sample, Convenience Sampling, Cluster Sampling, or Stratified Random Sampling. Also determine wheth
In a sample of seven cars, each car was tested for nitrogen-oxide emissions ( in grams per mile) and the following results were obtained: 0.06, 0.17, 0.08, 0.14, 0.11, 0.08, 0.17.
According to Harper's Index, 48% of all federal inmates are serving time for drug dealing. A random sample of 15 federal inmates is selected.
Do one of the following as appropriate: A) find critical value za/2 B) find critical value ta/2 C) state that neither are normal nor t distribution applies.
What percentage of the years would average between 21 and 37 days of excess emissions of sulfur dioxide? 95% What percentage of the years would exceed 37 days? 2.5%
Conduct a hypotheses test to determine whether the mean number of days until a home is sold is different than the Hamilton county mean of 86 days in the nearby county. Round your answer to four deci
Regulation requires the measurement of contaminant flow rate for 3 days. The plant will be charged with a violation if excessive contaminant flow rate is observed during the 3-day period.
Show how you get the probabilities of winning all of the above amounts. Find the expected winnings. Find the expected gain after paying $1 to play.
From a set of n people, a committee of size j, j<n, is to be chosen, and then a subcommittee of size i, i < j, is to be chosen. Derive a combinatorial identity for the number of subcommittees
A box contains tags marked 1, 2, 3,..., n . Two tags are chosen at random. Find the probability that the tags chosen show two consecutive numbers if
A pair of dice is rolled 5 times. Find the probability that a total of 11 occurs twice before a total of 5 occurs.
Let N be the set of positive integers and, for each n ? N,
A social worker is interested in estimating the average length of time spent outside of prison for first offenders who later commit a second crime and are sent to prison again.
A company that manufacturers coffee for use in commercial machines monitors the caffeine content in its coffee. The company select 25 samples of coffee every hour from its production line and determ
Find the mean and the standard deviation. Now change the score of X 8 to X 18, and find the new mean and standard deviation.
What is the value of sigma y-bar? (in days, carry answer out two decimal places)
Rotter Partners is planning a major investment. A probabilistic estimate gives the following distribution(in millions of dollars):
The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.25 grams per mile (g/mi) and standard deviation 0.08 g/mi. Government regulations call for
The mile time of all potential runners in this region are normally distributed with a mean of 8.2 minutes and a standard deviation of 1.5 minutes. What is the cutoff time for a runner to qualify for
At cruising altitude, a commercial jet engine consumes an average of 850 gallons of fuel per hour with a standard deviation of 48 gallons per hour. Assuming that the fuel consumption follows a norma
To evaluate the performance of a certain brand of alkaline battery, researchers at a consumer testing laboratory measure the lifetime of 160 1.5-volt batteries.
The mean annual precipitation for Dilbertville is 44 in with a standard deviation of 6.5 in. Assuming the precipitation follows a normal distribution,