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Jones figures that the total number of thousands of miles that an auto can be driven before it would need to be junked as an exponential random variable with parameter 1/20. Smith has a used car that he claims has been driven only 10,000 miles. If Jones purchases the car, what is the probability that she would get at least 20,000 additional miles out of it? Repeat under the assumption that the lifetime mileage of the car is not exponentially distributed but rather is (in thousands of miles) uniformly distributed over (0, 40).
Estimate the mean age of cars driven by students at your college. Use the range rule of thumb to make a rough estimate of the standard deviation of the ages of cars driven by students at your college.
Based on the results of the peliminary poll, how large a sample is required for the main poll, assuming that the main poll should have a margin of error of 3.3% and a confidence level of 96.7%.
1 examine the given statements then express the null hypothesis and alternative hypothesis in symbolic form. be sure to
consider a virus that is spread by transfusions of blood contaminated by the virus a person receiving contaminated
a survey of 175 gun owners was taken and 44.3 of them said they have a gun for protection for self andor family. is
What are the differences between PCA, Regressin, Discriminant analysis , (K-means, hierarchicalmethods) and logisic regression(Bases in the goals and Variables (Y and Xi)
it is desired to test whether the number of gamma rays emitted per second by a certain radioactive substance is a
Translate this into a statistical hypothesis-testing problem and carry out the test. Be sure to give the null and alternative hypotheses, the value of the test statistic, the p-value, and your conclusions.
Millie and Senta Meter have recently taken Pre and Post test in achievement. The test were normally distributed. Millie's percentile rank changed from 57.93 to 77.34. Senta's changed from 1.07 to 4.95.
The average monthly electric bill of a random sample of 256 residents of a city is $90 with a standard deviation of $24.
Washing machines leaving the factory that are defective. Obtain a sample size that will ensure a margin of error of at most 0.014 for a 97% confidence interval.
an analyst from an energy research institute in california wishes to precisely estimate a 99 confidence interval of the
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