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If the average price of a new home is $400,000, find the maximum and minimum prices of the houses a contractor will build to include the middle 65 percent of the market. Presume a normal distributio
A survey of 460 voters in one state reveals that 315 favour approval of an issue before legislature. Construct the 90 percent confidence interval for the true population proportion of all voters in
Critical path method/ Program Review Technique using normal distribution.
Tom, a director of Management Resources, Inc., is in the procedure of designing a program that his customers can use in the job finding process. Some of the activities include preparing resume
A researcher wishes to estimate, with 95 percent confidence, the proportion of people who own a home computer. A previous study shows that 40% of those interviewed had a computer at home. Find the
A survey of 30 adults found that mean age of a person's primary vehicle is 5.6 years. Assume that the standard deviation of the population is 0.8 year, find a 99 percent confidence interval of the
How large a sample is essential if the teacher would like to be 98 percent confident that the estimate should be accurate within 1 year? From a previous study, the standard deviation of the ages is
The time it takes to assemble an electronic component is normally distributed with a mean of 17.2 minutes and a standard deviation of 3.1 minutes. The probability is 95% that it will take as a minim
Listed below are the winning times in seconds, of men in the 100-meter dash for consecutive summer Olympic Games, listed in order by row. Assume that these results are sample data randomly sel
The world's smallest mammal is the bumblebee bat, also known as the Kitti's hog-nosed bat. Such bats are roughly the size of a large bumblebee.
Construction linear regression equation.Refer to data set and use the weights of discarded plastic and the corresponding household sizes. Find out the best predicted household size given that househ
While is it important to have matched pairs rather than two independent sets of data.
A computer file of all smokers is compiled and they are all numbered consecutively, then a random numbers generated by computer are used to select a sample of 1000 smokers.
Given independent random variables X and Y with means and standard deviations as shown, find out the mean and the standard deviation of each of these variables.
The Centers for Disease Control say that about 30 percent of high school students smoke tobacco. Suppose you randomly selected three high school students to survey them on their attitudes toward sce
The crocodile skeleton found had a head length of 62 cm and a body length of 380 cm. Which species do you think it was? give details why.
You play twice. Assuming the plays are independent events, what are the mean and the standard deviation of your total winnings.
A machine has 9 identical components which function independently. The probability that a component will fail is 0.20. The machine will stop working if more than three components fail. Find the prob
The participants in a television quiz show are picked from a large pool of applicants with approximately equal numbers of men and women. Among the last 11 participants there have been only 2 women.
A test consists of 10 true/false questions. To pass the test a student must answer at least 7 questions correctly. If a student guesses on each question, what is the probability that the student wou
A company purchases shipments of machine components and uses this acceptance sampling plan: at random select and test 21 components and accept the whole batch if there are fewer than 3 defectives. I
A survey for brand recognition is completed and it is determined that 68 percent of consumers have heard of Dull Computer Company. A survey of 800 randomly selected consumers is to be conducted. For
To calculate the probability value using normal distribution for the given data and Central Limit Theorem Area under a Curve-
Explain Estimating probability with the given data. and the probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality
Explain Estimating the probability with the given data. Explain a certain airplane has two independent alternators to provide electrical power and the probability that a given alternator will fail o