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A certain type of lightbulb has an average life of 500 hours with a standard deviation of 100 hours. The length of life of the bulb can be closely approximated by a normal curve. An amusement park buys and installs 10,000 such bulbs. Find the total number that can be expected to last for each period of time.
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
A wholesaler assures retailer replacement times for TVs normally dist. with mean of 8.2 and s.d. of 1.1. The retailer finds that a random sample of 20 sets from the wholesaler have mean replacement time of 7.6 years.
A random variable is normally distributed with a mean of 25 and a standard deviation of 5. If an observation is randomly selected from the distribution:
A 95% confidence interval for the average difference between the two reaction times (traditional - LED) was (-171.37, 174.44). Which of the following is the appropriate conclusion?
What is the OR of getting cancer fora late child birth woman compared to an early first birth woman?
The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
Use Chebyshev's theorem to determine what percent of values will fall between 58 and 82 for data set with mean of 70 and standard deviation of 4.
Computing the Z scores for the given data and evaluate µ and σ for the population.
Determine future value of annuity due which has $750 deposited at the starting of each month for 15 years at 5.9% compounded monthly.
Draw and label distribution used and position of values found.
Paul has calculated the indifference probability for the lottery having a payoff of $160K with probability p and -$80K with probability (1-p) as follows:
The DPMO for process is 860. Find the approximate Six Sigma level of the process?
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