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In a battleground state, 36% of all voters are Republicans. Assuming that there are only two parties - Democrat and Republican, if two voters are randomly selected for a telephone survey, what is the probability that they are both Republicans? Round your answer to 4 decimal places.
Find out the probability that: First electric brush chosen is defective?
One characteristic of billiard balls is their elasticity - the bounce they get when striking one another. A manufacturer of billiard balls is testing three additives to the basic plastic.
Is it necessary to assume a normal distribution on the population to estimate the value of the mean spending per day? Explain.
A manufacturer claims that the mean lifetime,M , of its light bulbs is 51 months. The standard deviation of these lifetimes is 9 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 53 months.
Two marbles are selected, one at a time from a jar of marbles containing 10 black, 10 brown, 10 white and 10 green marbles. Let x represent the number of white marbles selected in 2 separate selections from the jar.
A new car is designed to run a mean of at least 50 000 kilometers before its first tune-up. Tests with 30 cars show a sample mean of 49 500 kilometers and a sample standard deviation of 1000 kilometers.
We would like to test if the proportion of respondents that support the health care bill is less than 50% (a) what kind of hypothesis test is appropriate?
A manufacturer claims that the life span of its tires is 51,000 miles. Assuming the manufacturer's claim is correct, what is the probability the mean of the sample is 50767 miles or less?
Make three-month and four-month moving averages for this time series. Does the three-month or four month moving average provide the better forecast? Explain.
The Daytona Beach Tourism Commission is interested in the average amount of money a typical college student spends per day during Spring Break.
Using the business problem selected ( business, economic or marketing)develop a problem statement which can be addressed with survey research. Prepare a 10-13-question survey to collect primary data regarding your selected problem statement.
\Write down the general formula for the discrete uniform probability distribution function. Now write down the probability distribution function for the random drawing of tile numbers. Is this a discrete uniform distribution?
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