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The lifespan of a particular brand of light bulb is normally distributed with a mean life of 400 h and a standard deviation of 12 h. Production for the last week was 800,000 light bulbs. Use this information to answer the following questions.
a) What is the z value of a light bulb having a life of 421 h?
b) How many light bulbs can be expected to have a life less than 379 h?
c) What percent of the light bulbs should have a life less than 430 h?
The level of various substances in the blood of kidney dialysis patients is of concern because kidney failure and dialysis can lead to nutritional problems.
comparison of paired and unpaired samples test.nbspnbspnbspnbspnbspnbspnbspnbspnbspnbsp a local voluntary organization
One of the most famous probability calculations is called the "birthday problem". In probability theory, the birthday problem or birthday paradox concerns the probability that, in a set of n randomly chosen people
1000 tickets for prizes are sold for $2 each. Seven prizes will be awarded - one for $400, one for $200, and five for $50. Steven purchases one of the tickets.
a small company has 10 employees that receive a monthly paycheck and you calculate the mean and standard deviation for
What is the major difference between finding significance and confidence intervals using population samples or using population proportions?
Develop a forecast of enrollment next semester using exponential smoothing with a a= 0.2. Assume that an initial forecast for the first semester was 120 (so the forecast and the actual were the same.)
Suppose that 1 out of 500 infant's are born with Down's Syndrome.
What are the advantages and disadvantages of each? Explain how the empirical rule help explain the ways in which the values in a set of numerical data cluster and distribute?
Do these simulated data provide evidence for us to conclude that a difference in the spinal canal cross sectional area exist between the population of subjects with disc hernination and a population of those who do not have disc hernation?
Given P(x), where P describes the kth Lagrange polynomial that interpolates f at k+ 1 points:
would this prove that they are exceeding their goal, using α = .025?
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