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Consider the following simple model for daily changes in the price of a stock. Suppose that on each day, the price either go up $1 with probability 0.55 or goes down $1 with probability 0.45. Suppose the price at the beginning of day 1 is $20. Let Y denote the price at the end of day 20. Assume the stick price at the end each day is independent. Then Y = 20 + S20i=1 Xi
a) What is the distribution of Xi for I = 1, ..., n and Y?
b) Find E[Y] and Var[Y]
c) Use the central limit theorem to approximate P(X ³ 23)
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
discovering statistics referring to the information from my first question as stated nielson media research reported
an automobile mileage study tested the following hypothesishypothesis conclusionhomicro? 25
Suppose U is a Unit (25, 50) random variable.Find the CDF of U and sketch a graph.
Analyze whether or not patients undergoing this treatment are illustrating significant change from baseline to 3 months afterward. Report a p-value.
Compute the probability of receiving four calls in a five-minute interval of time. Compute the probability of receiving more than 10 calls in a five-minute interval of time.
The sample mean of the number of spots on the 6000 rolls, should be about If this die is rolled 6000 times, the number of times we get a 2 or a 3 should be about
In fact, the amount of coverage is known to be approximately normally distributed with a standard deviation of 25 square feet. How large a sample should be taken to estimate the true mean coverage of all 1-gallon cans to within 5 square feet with ..
a boiler has five identical relief valves. the probability that any particular valve will open on demand is0.90.
On what method is the Excel based calculator that you have provided based on (Exact, Score, Wald, Adjusted Wald). Also, what method is the calculation in Minitab based on?
Verify that the fitted values have the same mean as the actual y-values, and that the residuals have mean zero and show that the variance of the fitted values plus the variance of the residuals adds up to the variance of y. Find the R-squared.
What is the expected duration of the game? Given the same CIC, how much more money should Alice have ititially so as to maximize the expected duration of the game?
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