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Supposing that 50% is the true percentage of graduates who stay at their first job less than 2 years, find out the mean as well as standard deviation of numbers of such graduates in randomly selecte
Determine the sensitivity and specificity of the test? Assume that 1 out of 500 infants are born with Down's syndrome
A confidence interval determine for the population mean is given to be (41.16, 49.85). If the standard deviation is 16.290 and the sample size is 54, answer each and every of the following (show al
Salaries for Actuaries the average salary for graduates entering the actuarial field is $40,000. If the salaries are basically distributed with the standard deviation of $5000, find out the probabil
A six-sided die is printed with numbers 1, 2, 3, 5, 8, and 13. Roll the die once-what is the probability of getting an even number? Roll the die twice as well as add the numbers. What is the probabi
Emergency Calls the number of emergency calls local police department receives per 24-hour period is distributed as shown here.
The amount of soda dispensing machine pours in a 12 ounce can of soda follows normal distribution with mean of 12.18 ounces and standard deviation of 0.14 ounce.
The trunk lengths of adult elephant are normally distributed with mean of 8.3 feet and standard deviation of .08 feet. Employ this information to answers this: Find out the percentage of adult eleph
The number of incoming phone calls at company switchboard throughout 1-minute intervals is believed to have Poisson distribution. Use a= .10 and following data to test the assumption that the incomi
The National Sleep Foundation employed a survey to find out whether hours of sleeping per night are independent of the age (Newsweek, January 19, 2004). The following show the hours of sleep on week
What sample size would be required so that the width of the 99% confidence interval would be at most 0.02 units wide? Be as conservative as possible with your answer!
Find out the estimated standard error for the sample mean for each of the following samples:
The car theft rate in City of Cleveland is displayed in column 2 for the years 1995-2001 forecast the rate for 2002, 2003 and evaluate the entire safety factor of living in Cleveland
In 1982 The US Corps of the Engineers published this information to the members of Upper Mississippi Waterways Towing Association. It took the years 1974- 1980 and represented tons of grain to Gulf
Here is the data set which represents hours which my buses idle per day while on assignment. We are trying to decrease the idle time because, it pollutes and wastes fuel. The idles times are a fleet
What is the discrepancy (between his best estimate and the accepted value)? Do you think it is significant? Note: Do NOT calculate an average and standard deviation for the given data - reason your
Business Week conducted survey of graduates from 30 top MBA programs (Business Week, September 22, 2003). The survey found that the average annual salary for male and female graduates 10 years after
Scores on the SAT test are normally distributed with the mean of 1518 and the standard deviation of 325. Scores on the ACT test are normally distributed with mean of 21.1 and a standard deviation of
Determine the probability that a simple random sample of 40 male graduates will offer a sample mean within $10,000 of the population mean, $168,000?
Explain the underlying sample space S of this random experiment and specify the probabilities of its elementary events. Explain the mapping from S to Sx, the range of X.
If a random variable has standard normal distribution, find out the probability that it will take on a value
Find out the z value(s) for probabilities of random variable having standard normal distribution for
Turner's syndrome is rare chromosomal disorder in which girls have only one X chromosome. The condition affects about 1 in 2000 girls in the United States. About 1 in 10 girls with Turner's syndrome
The assembling department has 200 hours of the labor available each and every week and the inspection department has 660 hours of labor available per week.
A sample of n = 16 scores has mean of M = 83 and standard deviation of s = 12. (a) Discuss what is measured by sample standard. (b) Calculate the estimated standard error for sample mean and explain