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According to Pew Research Center, 71% of Internet users accessed video-sharing sites in August2011. A random sample of 50 Internet users was selected. Using the normal approximation to thebinomial distribution, what is the probability that 37 or more people from this sample accessvideo-sharing sites?
question control charts for xolineand r are in use with the following parameters. the sample size is n 9. both
At the .05 significance level, is the number of units produced on the afternoon shift larger?
The calculated Z test statistic is a positive value that leads to a p-value of .045 for the test. If the significance level (α) is .01, the null hypothesis would be rejected.
Pilot sample of n = 50 tires illustrated sample standard deviation equal to 4,000 miles. Based on this information, required sample size is?
At one university, the distance to students' home is normally distributed with a mean of 200 miles and a standard deviation of 25 miles.
transrail is bidding on a project that it figures will cost 400000 to perform. using a 25 markup it will charge 500000
Suppose the exogeneity assumption holds. Can you use the data to show that a response schedule is false? Usually? Sometimes? Hardly ever? Explain briefly.
Suppose that the service rate to a waiting line system is 10 customers per hour (exponentially distributed).
Define each of the following as classical, empirical, or subjective probability. a. The probability that the baseball player Derek Jeter will get a hit during his next at bat.
The probability that 0, 1, 2, 3 or 4 people will seek treatment for the flu during any given hour at any given emergency room is shown in the following distribution. What are the variance and standard deviation of X?
When comparing the mean annual incomes for executives with a High School education or less and Undergraduate Degree, the 95% confidence interval shows an interval of 11.7 to 42.7 for the difference. This result indicates that
the mean price of ground beef in 75 cities in the midwest is 2.11 and teh standard deviation is .56. a midwest grocer
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