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1. Assume that the income of pediatricians is normally distributed with mean μ =$100,000 and standard deviation σ = 10,000. Determine the probability of observing an income between $85,000 and $115,000.
2. Suppose the winnings of gamblers at Las Vegas are normally distributed with mean μ = -300 (the typical person loses $300), and standard deviation σ = 100. Determine the probability that a gambler does not lose any money.
Calculate the 95% standard deviation for each department and indicate for me if any department is receiving on average $2k or more on the high end.
A trigger call option forces the holder to buy a stock S at a price K if the stock price is above H at the time of expiry. Develop an analytic formula for the price of this option in a Black-Scholes world.
a. What is the expected number of these tweets with no reaction (to the nearest whole number)? b. What are the variance (to 2 decimals) and standard deviation (to 4 decimals) for the number of these tweets with no reaction?
What is simple linear regression? How is regression used to create equations and to make predictions?
a. What is the probability of a student correctly answering no less than 22 questions based solely upon guessing the answer to each question?
The customers arriving between 0 and 1 have to wait until the store opens. Suppose X is the total times that these customers have to wait. Calculate Var(x).
actual sales for january through april are shown below.month actual sales ajanuary 18february 25march 30april 40mayuse
What is the best predicted IQ of the younger child, given that the older child has an IQ of 110? Use a significance level of 0.05.
Suppose the mean test scores for a college enter exam is normally distributed with mean = 78 and standard deviation = 12. a). If an individual student is selected at random, what is the probability that this student's score is over 80?
An I/O psychologist asks employees to complete surveys measuring job satisfaction and organizational citizenship behavior.
The proportion of people aged 18-25 who currently use illicit drugs is equal to 0.20 (or 20%). Now, express the null hypothesis H0 and alternative hypothesis H1 in symbolic form.
Redo Exercise 4.67 assuming correlation 0.01 between civilian and military sales. Redo the exercise assuming correlation 0.99. Comment on the effect of small and large correlations on the uncertainty of Gain's sales projections.
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