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a light bulb has a standard deviation of 30 hours and a mean of 800 hours. What is the probability the bulb will last at least 860 hours?
Statistics and Probability, Statistics
A single person with a monthly taxable income of $2800 in the 15% federal marginal bracket, has a state tax rate of 7.95% and social security taxes at 6.2%. This person forgoes consumption and instead places $230 into a ...
A researcher conducts a hypothesis test using a sample from an unknown population. If the t statistic has df = 35, how many individuals were in the sample?
Amy wants to deposit money each year for the next five years and each deposit to have $30,000 in real dollars currently and the inflation rate is 3% per year and the nominal interest rate is 9.18%. (Round off all answers ...
Help me solve the following 1) When there is a significant difference in the population, but the research fails to find one ...this is what kind of error? 2) Assume that when victims are asked how well their needs were m ...
1. Choose all probability distributions which are theoretically related to normal probability distribution 2. The 68-95-99.7 rule states that in a normal distribution 3. For a normal distribution the a mean of 179 and st ...
In developing their warranty policy, a washing machine company estimates that over a 1-year period 15% of their new washing machine will need to be repaired. You and your neighbor both purchase a new washing machine. 1) ...
Suppose a soccer team wins each of its games with probability 0.4, loses with probability 0.4, and ties with probability 0.2, with each game's outcome independent. Their season starts, and they play a game every day.Let ...
On the below question, how did they decided the two probabilities of guessing the correct and wrong answer on a question? Where did the 0.25 and 0.75 come from? The probability of achieving exactly k successes in n t ...
In a random sample of 100 college student 60 were females, 65 were under 21 years of age and 15 males were 21 years of age or older, a student is selected at random from the sample. What is the probability that a female ...
Next time you see an elderly man, check out his nose and ears! While most parts of the human body stop growing as we reach adulthood, studies show that noses and ears continue to grow larger throughout our lifetime. In o ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As