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Certain TVs require a special light bulb to project the picture. Assume that the average life of a bulb is 1,000 hours and that this failure time follows the exponential distribution. What is the probability that a randomly selected bulb will last between 900 and 1200 hours? Round to four decimal places
A sample of 23 European countries found that the variance of life expectancy was 7.3 years. What is the 95% confidence interval estimate for the variance of life expectancy in Europe?
The analyst concludes that the patients of physicians not participating in the program are older than the patients of participating physicians and therefore not a good comparison group for an observational study.
Attitude change is thought to result from the anxiety produced under conditions of cognitive dissonance. The data below represent the anxiety scores of subjects in a dissonance study.
What is the Central Limit Theorem? How large should the sample size be if the underlying distribution of the population values are:
In District C the average turnout has been 31% with a standard deviation of 15% Can the chronicle conclude that there is really a difference in voter turnout between the two? Do a hypothesis test using alpha of .05
question 1suppose that we have ratings of a restaurant from a sample of 72 customers. each of the ratings is either
Shown below are the results of a one sample t test. Make up a problem that someone could solve using the printout. Do not make up the data. Just assume the data were collected and produced the given statistics.
binary communication system transmits bit 0 or 1 every bit interval. probability of transmitting bit 1 and 0 are
determine whether each of the distributions given below represents a probability distribution. justify your
Jim Sears manufactures farm equipment. His work requires the use of steel bars which must have a mean length of at least 50 inches. The bars can be purchased from a supplier in Kansas
Descriptive statistics for given data - Evaluate the range, variance, and standard deviation of the data set. Interpret the results in the context of the real-life setting.
When filter permits spam to slip through into your inbox, which type of error is that? Which type of error is it when the real message gets classified as junk?
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