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The average lifespan of a certain kind of car is 161,000 miles with standard deviation of 18,000 miles. If 40 cars are randomly selected, what is the probability that their average lifespan will exceed 163,000 miles?
can you please help me with this question? thank you so much.a large publishing house recently conducted a survey to
question suppose you have an investment a whose return is normally distributed with mean 8 and standard deviation of
What is the probability that a surveyed voter plans to vote to reelect the mayor?
Calculate the expected value of your portfolio and calculate the expected standard deviation of your portfolio.
How do we call governments plan to deal with internal issues of a country?
airlines overbook tickets sales based on the assumption that a percnetage of passengers will not show on the day.
1. Calculate the mean, median, and standard deviation for ounces in the bottles. 2. Construct a 95% Confidence Interval for the ounces in the bottles.
The standard deviation of the market index is 25%; the residual standard deviation of the error terms for stock A is 20%; the residual standard deviation of the error terms for stock B is 10%. What is the covariance between the returns on stocks A..
given two original random variables x and y suppose that we modify one of them by adding a constant w a x. how does
Given the following values: = 20, M = 16, = 0.7, conduct a one-sample z test at a .05 level of significance. What is the decision for a two-tailed test?
1. What is the uncertainty distribution for the number of spots on the up side when the die is thrown? Write down all of the possible outcomes and their probabilities. [Hint: The probabilities must add up to 1.] 2. Calculate the mean of the uncert..
A company provides its three employees with health insurance under a group plan. For each employee, the probability of incurring medical expenses during a year is 0.9, so the number of employees incurring medical expenses during a year has a binom..
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