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The speed of a file transfer from a server on campus to a personal computer at a student’s home on a weekday evening is normally distributed with a mean of 63 kilobits per second and a standard deviation of four kilobits per second.   What is the probability that the file will transfer at a speed of 70 kilobits per second or more?

What will `rep(1:3, 2)` return?

In what scenario is the median particularly informative as a measure of central tendency?

The arithmetic mean is fundamentally equivalent to what common concept?

When considering the initial step in statistical analysis of a data set, which method is typically employed for summarizing data in a comprehensible form?

What is a dichotomous variable?

Which measure of central tendency is not affected by extremely high or low scores in a dataset?

Your exercise routine requires you to travel to the gym, complete your workout, and return home. Suppose that the proportion of the total time for travel to the time at the gym follows a beta distribution with α = 0.5 and β =1.   What is the probability that the proportion of time for travel to the gym exceeds 0.68?

We model the gene mutation of a virus as a Poisson process. Suppose a virus mutates once every 3 months on average.  What is mean time until the fifth mutation?

What defines a confounding variable in a study?