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A researcher wants to estimate the average amount of time that people spend to get to work. Based on previous data, the travel times are normally distributed with a mean of 25.2 minutes and standard deviation of 5.4 minutes. What is the required sample size, if the researcher wants to be accurate to within 0.5 minutes at a 95% level of confidence?
Conduct t-test analysis, using guidelines in the instructions provided - Write your results in a report, using the outline provided
assume that 64 of twins are of the same gender. given that a newborn set of twins is of the same gender what is the
Let TA, TB, and Tc be the failure times of components A, B, and C. Assume these are independent exponential random variables with rates a, ß, and ?.
a) Create a probability model for the profit on a policy. b) What's the company s expected profit on this policy?
In a survey of students at the University of California, Davis (UCD), students were asked which of two popular soft drinks they preferred-let's call them brand.
The report "Audience Insights: Communicating to Teens (Aged 12-17)" (www.cdc.gov, 2009) described teens' attitudes about traditional media
every day for 100 days 72 samples were taken of fuses rated at 6a and measures the current that they burn out. a
in determining the range of an acoustic source by triangulation one must accurately measure the time at which the
An automobile company thinks that with new designs, it scars will last longer before having a problem. For this reason the company wishes to extend the warranty that comes with the vehicle in hopes of attracting more customers.
in basketball a players free throws percentage ft is expressed as a number between 0 and 1 which represents the
conduct a test of hypothesis to determine whether the mean payroll of the teams was different from 80 million. .05 is
Based on this graph, which treatment would you recommend for these patients and why? Explain why a histogram was not used.
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