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Question: The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months. A sample of 64 of these smartphones is taken.
What is the distribution for the length of time one battery lasts?
For people with a certain disease, the length of time Y spent in remission is described by the following pdf
The Complement rule states that the probability of an event not occurring is
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
The weekly salaries one year after graduation are normally distributed with a standard deviation of $85. If one graduate is randomly selected. Describe the distribution of the weekly salaries being earned one year after graduation.
When you are setting up a hypothesis test based on some claim, why is it absolutely necessary that the level of significance, alpha, be set early and upfront before any calculations are made? What are the serious mistakes that are made
A feed company is developing a feed supplement from two grains A and B. Each kilogram of A contains 0.3 grams of protein and 0.2 grams of carbohydrates; each kilogram of B contains 0.9 grams of protein and 0.1 grams of carbohydrates.
wayne collier designed an experiment to measure the fuel efficiency of his family cat under different tire pressures.
Verify that the acf display a damped sine wave behavior and find the frequence and period of the acf
6% are too long and can be used after being cut, and 4% are too short and must be scrapped. What is the probability that a randomly selected bolt can be used?
a normal population has a mean of 60 and a standard deviation of 11. you select a random sample of 9. compute the
Analyze these data and summarize your findings for managers. Explain how information can be used by decision makers. Assume that sales per customer are normally distributed.
If the microbrewery seeks a 95% confidence level and a precision of .5 beers, what size sample should be used in the study? Show the calculation; otherwise, the answer will not be accepted.
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