Determine the true proportion of home owners
A report states that 46% of home owners had a vegetable garden. How large a sample is required to determine the true proportion of home owners who have vegetable gardens to within 3% with 99% confidence?
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A binary code (0,1) is transmitted along a noisy communication channel. In the absence of noise, relays A,B of the receiver are activated. If 0,1 are received respectively as a result of noise distortions, relay A may also be activated by a 1 and
Assume that the joint pdf of two continuous RVs X and Y is given by f(x,y) = kxy^2 if 0 less than or equal to x less than or equal to y less than or equal to 1 0 otherwise
The winning team's scores in 5 high school basketball games were recorded. If the sample mean is 10.5 points and sample standard deviation is 0.25 points, find out the 98% confidence interval of the true mean.
A sample of 31 European countries found that variance on life expectancy was 5.2 years. Determine the 99% confidence interval for the variance of life expectancy in Europe?
A food snack manufacturer samples seven bags of pretzels off the assembly line as well as weighed their contents. If the sample mean is 10.4 and the sample standard deviation is 0.15, find out the 95% confidence interval of the true mean.
A study of 100 white mice showed that their average weight was 5.2 ounces. The standard deviation of population is 0.6 ounces. Which of the following is the 99% confidence interval for mean weight per white mouse?
If a sample of 45 flies were taken from this population, what is the probability that the mean life time is (a) less than 55 (b) between 58 and 66 (c) greater than 65 days?
A radio manufacture claims that 65% of teenagers 13 to 16 years old have their own portable radios. A researcher wishes to test claim and chooses a random sample of 80 teenagers. She finds out that 57 have their own portable radios. At a=0.05, sho
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