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The life in hours of a laser is known to be normally distributed with a standard deviation of sigma = 20 hours. A sample of 15 lasers and their lives is as follows: 708, 692, 736, 707, 708, 696, 708, 693, 705, 701, 734, 684, 707, 722, 694. a). Is there evidence to support the claim that the mean life does not equal 695 hours? Use alpha = .1 b) What is the beta value if the true mean life is 715 hours? Please show work.
How large should n be so that Chebyshev's inequality guarantees that the estimate is within 5 centimeters from h, with probability at least 0.99?
Conduct the hypothesis test and compute the p-value. At a 0.05 level of significance, what is your conclusion?
question the following table gives a two-way classification based on gender and employment status of the civilian
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
A human resources director, on learning about the regression effect, decides to hire people who have been fired by their previous employer for poor performance.
Develop a 95% confidence interval of the difference between the daily population means for the two airports.
Solve different inventory control problems using an appropriate OR method.
A random sample of 100 observations is obtained from a normally distributed population with a standard deviation of 10. What is a 95% confidence interval for the mean of the population if the sample mean is 40?
What does the intercept mean in this context? What is the estimated percent decline in visual field per year?
an experiment was conducted to compare the weights of the combs of roosters fed two different vitamin-supplemented
The local operations manager for the IRS must decide whether to hire 1, 2, or 3 temporary workers. He estimates that net revenues will vary with how well taxpayers comply with the new tax code.
The probability of drawing two diamonds (to complete a flush) after discarding the 5 and 7.
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