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In a supermarket 20% shoplifters usually get caught, if a random sample of 8 shoplifters is selected. Find the mean and variance of the distribution. What is the probability that 3 will get caught?
Find out the required probabilities utilizing Binomial distribution. According to Best buy, 2/3 citizens have iPods. In a randomly selected group of 3 iPod owners.
From a population of cereal boxes marked "12 ounces," a sample of 81 boxes is selected and the contents of each box is weighed. You want to test whether the population mean is different from 12 ounces.
If θ1 and θ2 are unbiased estimators of θ, show that θ3=k1θ1+ k2θ2 is biased estimator of θ. What condition must be imposed on constants k1 and k2, so that θ3 is an unbiased estimator of θ?
Think about a density curve that consists of two line segments. The first goes from the point (0, 1) to the point (0.7, 1). The second goes from (0.7, 1) to (0.9, 2) in the xy-plane. What percent of observations fall below 0.70?
Seiko purchases watch stems for their watches in lots of 10,000. Seiko's sampling plan calls for checking 20 stems, and if 3 or fewer stems are defective, the lot is accepted.
There are three hospitals in the Tulsa, Oklahoma, area. The following data show the number of outpatient surgeries performed at each hospital last week.
Estimate the true proportion of college students who believe in the possibility of haunted places with 99% confidence. According to Time magazine, 37% of americans believe that places can be haunted.
Use Hypothesis testing to determine if Dr. Boom is correct, that his sample of 25 rockets weight less than the average rocket.
Determine the median, and the standard deviation. Determine the coefficient of skewness using Pearson's method. Listed below are the commissions earned ($000) last year by the sales representatives at the Furniture Patch, Inc.
Suppose a machine is worth 33000 after 4 years and 18000 after 8. Find the rate of depreciation using the linear depreciation method
He measures the heights of 25 men from this century and finds the mean and standard deviation for his sample.
Hanna Properties specializes in custom-home resales in the Equestrian Estates, an exclusive subdivision in Phoenix, Arizona. A random sample of nine custom homes currently listed for sale provided the following information on size and price.
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