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1Suppose that the time (in hours) required to repair a car is an exponentially distributed random variable with parameter λ = 1/2. What is the probabil- ity that the repair time exceeds 4 hours? If it exceeds 4 hours what is the probability that it exceeds 8 hours?
2. Suppose that the number of years a car will run is exponentially distributed with parameter µ = 1/4. If Prosser buys a used car today, what is the probability that it will still run after 4 years?
The mean heart rate is 90 beats per minute with a standard deviation of 5. Find the 98% confidence interval for the true mean heart rate of all people with this untreated condition.
question anaheim human resources inc. performs employment screenings for large companies in southern california. it
Last week you posted the topic of your research, your initial predictions, and how you would go about finding that data. Now it is time to report your initial results and analysis.
If these two assumptions are correct, then what is the probability that the sample mean waiting time,T, based on your random sample of size n=36, will exceed 104 hours?
the heights of 1 year old children are normally distributed with a standard deviation of .75 inches and a mean of 28.3
Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that: Exactly half of them consume caffeine and smoke?
Use a Normal approximation to find the probability that 75% or more of the women in the sample have been on a diet.
you randomly selectnbsp9nbspfire-breathing dragons and the number of knights and princesses eaten by each dragon is
according to the internal revenue service the mean tax refund for the year 2013 was 3000. assume the standard deviation
A manufacturer claims that the mean lifetime, mu, of its light bulbs is 44 months. The standard deviation of these lifetimes is 7 months. Seventy bulbs are selected at random, and their mean lifetime is found to be 43 months.
a survey of women students at a college showed that 15 smoke cigarettes 40 drink coffee and 5 both smoke cigarettes and
samples and statistical inferencestatistics deals with data. the quality of statistical inference depends on the
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