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1. A company buys 100 lightbulbs, each of which has an exponential lifetime of 1000 hours. What is the expected time for the first of these bulbs to burn out?
2. An insurance company assumes that the time between claims from each of its homeowners' policies is exponentially distributed with mean µ. It would like to estimate µ by averaging the times for a number of policies, but this is not very practical since the time between claims is about 30 years. At Galambos'5 suggestion the company puts its customers in groups of 50 and observes the time of the first claim within each group. Show that this provides a practical way to estimate the value of µ.
Illustrate by computation that, for straight -line regression of Y on x, β1= 0.
question the distribution of grades in a large statistics course is as follows.outcome gradeoutcome numerical value for
When performing a 2-way ANOVA with replication you must first: A) Perform an interaction hypothesis test B) Take out the error because you ran replicates and error makes no sense with replicates
Regulations related to the release of personal and medical information of a patient. Describes the relevant components of the medical record you expect the family physician will want to see.
A manufacturer of executive jet aircraft is concerned with its profit picture over the short run. It produces two different models of planes, x1 and x2. Its profits are $30,000 for each x1 and $20,000 for each x2. There are two major constraints o..
Suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. Given that he tested 10 people, what would the estimated population variance be?
let xt be a brownian motion process with drift 10 and volatility 2.i find the conditional mean of x2 given x1 0 and
Fit both linear and an exponential trend to the data. (d) Which model is preferred? Why? (e) Make a forecast for 2003, using a trend model of your choice (or judgments forecast).
If he is a 1 to 2 favorite to win the Belmont Stakes as well, what is his probability of winning the Triple Crown? What do his chances for the Preakness Stakes have to be in order for him to be "even money" to earn the Triple Crown?
Difference Between Qualitative and Quantitative Research
If desired confidence level is 95 percent, suitable critical value is?
Calculate the test statistic for the claim in, using the following information. Sample information: A random sample of 40 repairs has a sample mean price of $132.09 and a sample standard deviation of $13.58.
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