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The life span of a battery is normally distributed with a mean of 2500 hours and at percent of batteries have a life standard deviation of 50 hours. What percent of batteries have a life span that is more than 2560 hours? Would it be unusual for a battery to have a life span that is more than 2560 hours? Explain your reasoning.
the gre combined scores for students applying to an engineering schools graduate program are normally distributed with
Forty percent of the time, sales are more than 470,000 and 10 percent of the time, sales are more than 500,000. What is the mean and standard deviation of the distribution?
1.reading highway signs is not always easy especially if your vision is imperfect. vision in general tends to
Additionally, method of delivery of drug (patch,pill, or nasal mist) was considered. In experiment, there were how many treatments?
The "average" (mean) tire wore out at 41,000 miles, and the standard deviation was 4000 miles. Approximately what percent of the tires are likely to wear out before 40,200 miles?
A person is considering purchasing the stock of two home health companies that are similar in all respects except the proportion of earnings paid out as dividends.
As the financial manager of ABC computers, you are ready to make some decisions. You are trying to see where revenues are going?is the company ready to expand, and if so, when?
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
There is concern about the percent of on-time flights. A recent survey of two major airlines yielded the following results. At α = 0.05 test the claim that there is a difference in proportions of on-time flights.
A random sample of 24 patients found a standard deviation of 520. Assume the variable is normally distributed and = 0.01. What are the critical values?
Stock 2 closing price over last month has the mean of 59.2 and the standard deviation of 3.3. Determine which has higher coefficient of variation?
Provide an example of a couple of variables that we work with that could meet the binomial criteria above.
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