Confident of estimating the population mean
If you want to be 99% confident of estimating the population mean to within a sampling error of ±20 and the standard deviation is assumed to be 100, what sample size is required?
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Calcualte a 95% interval of confidence for the mean and interpret your result
Determine the probablity that randomly chosen college student will take between 2 and 5 minutes to find a parking sport in the library parking lot.
At a local university, when scheduling classes, the probability that there're no evening classes available on certain day is 0.74 . Determine the probability that there is at least one evening class available on a that day? Write down only a numbe
If two gloves are randomly chosen from the box, without replacement (the first glove isn't returned to box after it is selected), determine the probability that there will be one right-handed glove and one left-handed glove selected?
Find the following t* and z* for the corresponding sample sizes and alpha levels.
Suppose that the demand for the good bananas has continuous distribution that is uniformly distributed between 5 and 10. What is the expected profit of David in a week if he buys 8 pounds of banana?
Suppose that 96% of ticket holders show up for airline flight. If plane seats 200 people, how many tickets should be sold to make the chance of overbooked flight (more ticket holders show up for flight than there are seats available) is at most 1
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