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1. (Computer Experiment.) Suppose a coin has probability p of falling heads up. If we ?ip the coin many times, we would expect the proportion of heads to be near p. We will make this formal later. Take p = .3 and n = 1, 000 and simulate n coin ?ips. Plot the proportion of heads as a function of n. Repeat for p = .03.
2. (Computer Experiment.) Suppose we ?ip a coin n times and let p denote the probability of heads. Let X be the number of heads. We call X a binomial random variable, which is discussed in the next chapter. Intuition suggests that X will be close to n p. To see if this is true, we can repeat this experiment many times and average theX values. Carry out a simulation and compare the average of the X's to n p. Try this for p = .3 and n = 10, n = 100, and n = 1, 000.
Calculate separately for each group (AG positive and AG negative) the mean x, variance s2, and standard deviation s for survival time. Calculate separately for each group (AG positive and AG negative) the mean, geometric mean, and median for w..
A "wild safari" park allows visitors to drive their cars through over 400 acres to see more than 1000 animals roaming freely. The park claims that the probability of some car damage by an animal during a safari drive-thru is 0.65. Suppose 20 cars ..
Enter data into SPSS (use two columns: one for coding {0, 1, 2, 3, 4, 5} and one for DV)
Ace Inc. has five employees participating in its defined-benefit pension plan. Expected years of future service for these employees at the beginning of 2014 are as follows.
Please answer the following: Prove that the square of an even number is even. Make sure to show all steps required.
Listed below are birth weights (in kilograms) of male babies born to mothers on a special vitamin supplement (based on data from the New York State Department of Health).
the number of telephone calls coming into a businesss switchboard averages 4 calls per minute.let x be the number of
Using the Hypothesis Tests Two Sample file and a .05 significance level, test whether there is a difference in the mean salary for men versus women.
Problem on standard deviation
What internal and external threats are and could you provide some examples of what would be considered a threat to internal and/or external validity of a study design.
if a gambler rolls a dice twice to get a sum of 10, he wins $10. and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of the game?
The students of Hugh Logan's math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the mean score
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