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According to the Chebyshev rule, at least what percentage of the observation in any data set are contained within a distance of 3 standard deviations around the mean. 1. 67% 2. 75% 3. 88.98% 4. 99.7%
Find out the upper and lower bounds on average life expectancy of the Canadian women such that at least 90% of all population is included.
Consider the following portion of an electric circuit with three relays. Current will flow from point A to point B if there is at least one closed path when the relays are activated. The relays may malfunction and not close when activated.
A sample of 50 retirees is drawn at random from a normal population whose mean age and standard deviation are 75 and 6 years, respectively.
Describe the difference between sample and a sampling distribution. Your reply must be in complete sentences and you may use sketches to help you.
Discuss an example from every day life, your professional experience, personal life or sports where two variables are positively correlated and why; discuss a second example where two variables are negatively correlated and why.
Engineers want to design seats in commercial aircraft so that they are wide enough to fit 98% of all males. (Accommodating 100% of males would require very wide seats that would be too expensive.)
A poll reported that 80% of adults were satisfied with the job major airlines were doing. Suppose 12 adults are selected at random and the number who are satisfied are recorded. find the probability that 9 or more are satisfied with the airlines b..
For the experiment above, let X denote the number of hearts that are drawn. For this random variable, find its expected value and standard deviation.
Construct a 95% confidence interval for the population mean.
Expand and aggregate plan using each of the following guidelines and complete the total cost for each plan. Which plan has the lowest total cost.
For binomial distribution among given values for n as well as p state whereas or not it is suitable to use normal distribution as an approximation.
Assume X is an exponential random variable with parameter lambda. Find the method of moments estimator for lambda.
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