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Many construction sites post a sign that proclaims the number of days since the last accident that injured an employee.
(a) A friend who walks by the construction site tells you to expect to see an ambulance any day. The count has grown from 20 days to 60 days to 100 days. An accident is coming any day now. Do you agree?
(b) Would you feel safer visiting a work site that proclaimed it had been 100 days since the last accident, or one that showed that the last accident was 14 days ago?
One of the 100 test subjects is selected at random. Given that the person selected approves of the mayor, what is the probability that they vote democrat?
The confidence interval must be less than 5 percentage points i.e. the confidence interval should extend at most 2.5 percentage points above and below the sample proportion?
A researcher is interested in knowing if there are differences between the incidence of accidents among male and female pilots. They were able to collect 62 responses from a random number of pilots. Among them, 17 male pilots were in accidents, 26 we..
a company is studying the number of daily debit card purchases. if there were 20 purchases and the probability of a
Let (X, A, P) be a probability space and T a measure-preserving trans- formation of X onto itself. Let Y be a real random variable on X and Yj := Y ? T j for j = 1, 2,... . Let S0 := 0 and for n = 1, 2,... , let Sn := Y1 + ··· + Yn and fn := m..
A wholesaler assures retailer replacement times for TVs normally dist. with mean of 8.2 and s.d. of 1.1. The retailer finds that a random sample of 20 sets from the wholesaler have mean replacement time of 7.6 years.
let x equal to the grade of a student in a stat course. suppose that x is nu 100. using the traditional method of
A coin was flipped 60 times and came up heads 38 times (a) at the time .10 level of significance is the coin based towards heads? show your decision rule and calculations (b) calculate a p value and interpet.
Use the graph of f(x)= x^ to match the function to its corresponding graph. In words describe the transformation that occurs (ex: The graph of f(x) is shifted 6 units to the left).
What is the probability that between 90 and 100 employers provide a two-day paid Thanksgiving holiday? That is, what is the ?
A sample of 400 bags of dog food which are advertised to contain twenty-five pounds had a mean content weight of 24.5 pounds with a standard deviation of 3 pounds.
Compare the unconditional probability of having the disease to the conditional probability of having the disease given the test says you have the disease.
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