makintosh
Oct 26, 2011, 05:47 PM
1a. Use a coin to simulate 25 births (ex: heads-boys and tails-girls) and record the number of imulated girls. Given 25 "births" compute the mean and standard deviation of the number of girls. Is the simulated result usual or unusul? Why? (11 tails/girls)
1b. Get the results of the 25 “births” from two other studebts in class. Combine these results with yours for a total number of births out of 75 and as above, the random variable and x= number of girls “born”. Given batches of 75 births, compute the mean and standard deviation of the number of girls. Is the simulated results usual or unusual? Why?
According to data from the American medical assoc. 10% of us are left handed.
2a. If 3 people are randomly selected, find the probability that they are left handed.
2b. If 3 people are randomly selected, find the probability that at least one of them is left handed.
2c. If groups of 100 people are randomly selected, what is the probability there are less than 89 left handed people?
2d. If groups of 30 people are randomly selected, what is the mean number of left handed people in such groups? So for a class, which is typically 30 students, what would be the usual number of left handed people in class?
3a. Statistics class are uniformally distributed between 70 and 83 minutes. What is the probability that class will last longer than 75 minutes.
3b. Classes are supposed to end in 75 minutes. Based on your answer in A, how often will class last longer than 75 minutes? Is it likely that class will last longer? Why?
1b. Get the results of the 25 “births” from two other studebts in class. Combine these results with yours for a total number of births out of 75 and as above, the random variable and x= number of girls “born”. Given batches of 75 births, compute the mean and standard deviation of the number of girls. Is the simulated results usual or unusual? Why?
According to data from the American medical assoc. 10% of us are left handed.
2a. If 3 people are randomly selected, find the probability that they are left handed.
2b. If 3 people are randomly selected, find the probability that at least one of them is left handed.
2c. If groups of 100 people are randomly selected, what is the probability there are less than 89 left handed people?
2d. If groups of 30 people are randomly selected, what is the mean number of left handed people in such groups? So for a class, which is typically 30 students, what would be the usual number of left handed people in class?
3a. Statistics class are uniformally distributed between 70 and 83 minutes. What is the probability that class will last longer than 75 minutes.
3b. Classes are supposed to end in 75 minutes. Based on your answer in A, how often will class last longer than 75 minutes? Is it likely that class will last longer? Why?