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a) The time to fail has a Weibull distribution for machine X that cost $300 to manufacture and has beta = 5 and theta = 400. Machine Y cost $500 to manufacture and has beta = 5 and theta = 500. If the machine will have a life of 30 hrs , which machine should I brief to the boss to sell?
b) Following a lognormal distribution with a mean of 3000 rpm and std deviation of 0.87, what if the boss want a 5% chance of HW failure before selling, how often would I have to replace this hardware ?
An experimenter is randomly sampling 5 objects in order from among 49 objects. What is the total number of samples in the sample space?
Test the hypotheses that the average household income in the township is greater than $100,000. Hint: Start by stating the null and alternative hypotheses.
Determine probability that student was sophomore? Determine the probability of selecting a face card from deck of 52 cards.
Why can not we just do several two sample tests like we did in the last week. In your own words explain briefly also tell us what these are and what did it mean.
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
A company auditor was interested in estimating the total number of travel vouchers that were incorrectly filed. In a SRS of size n =50 oft of the group of N = 250, were filed incorrectly.
Is the sample size large enough to construct a valid confidence interval for the proportion of debit cardholders who have used their card in making purchases over the Internet?
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?
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p-value.
The Minneapolis Tribune ran an article on gender differences in shopping behavior. When 400 women were asked to respond to the question "Where I shop is influenced by which store has a greater variety," 60% answered "Yes.
Assume that the measurements came from a normal distribution. The variability of the manufacturing process is unknown means the same as the standard deviation is unknown.
Find the critical value for t and determine the null and alternate hypothesis.
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