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A flange bolt wears out because of fatigue in accordance to lognormal distribution with MTTF = 10.00 hr and s =2.00. If preventive maintainance consists of periodically replacing the bolt, what is the reliability at 550hr with and without preventive maintance? Assume the bolts are replaced every 100 operating hours.
Calculate the Relative Precision Index in each case and, from the table on the following page, state the relative precision for each group and what remedial action should be taken to bring it back within specification limits?
Characteristics on patients participating in a clinical trial.
A company is considering producing two new products. Based on past records, management believes that there is 70% chance that the first product will be successful, and a 50% chance that the second product will be successful. As these products a..
what portion of variation in stock price percentage change is explained by the percent change in profit and what is the approximate predicted value for tips if the total bill is $100?
For a normal distribution, the z-score boundary that separates the lowest 2.5% of the scores from the rest is z = -1.96
The researchers used the available survey data and summarised the nature of the car accidents and if a mobile phone was being used by the driver either during (or immediately before) the accident
1. For a population with m = 50 and a standard deviation of s = 10,
A more general exponential reliability model may be defined by R(t)=a^(-bt) where a>1, b>0 and a and b are parameters to be determined. Find the hazard rate function, and show how this model is equivalent to R(t)=e^-(lambda*t).
The manager of a company wants to investigate job satisfaction among its employees. One morning after a meeting, she talks to all 25 employees who attend. Does this sampling plan result in a random sample? What type of sample is it? Explain
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the deci..
question 1nbsp calculating a z-score and graphing a box plotnbsplook at the data under dietarysupp.nbsp the table gives
A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly selected adults are given an IQ tesst, what is the probability that the sample mean scores will be between 85 and 125 points?
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