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Question: Suppose that, on average, 20 customers arrive every hour at a twenty-four-hour coffee shop. Assume that the time between customer arrivals is exponentially distributed. Determine
a. The probability that a customer arrives within the next 2 minutes.
b. The probability that the time between two arriving customers will be between 1 and 4 minutes.
c. The probability that 5 or more minutes will pass between customer arrivals.
Two independent samples of a random variable X are taken. - Determine the expected value and variance of the sample mean.
Find out optimal assignment and calculate total minimum cost.
Show that the set of all elements of R^2 of the form (a, -a), where a is any real number, is a subspace of R^2. Give a geometric interpretation of the subspace.
Calculate the P-value for the test of the hypothesis p1 - p2=0. Let p1 represent the population proportion of eligible students in Pennsylvania.
Standard deviation of 12 years. Worker is stopped at random and asked to fill out questionnaire. Determine the probability that this worker is less than 30 old?
Consider a large population with μ=70 and σ=10. Assuming nN≤0.05, find the mean and standard deviation of a sample mean, x¯, for a sample size of 19.
Interview about attitudes toward alcohol. You have given every student at the party the same chance to be interviewed: what is the chance? Why is your sample not an SRS?
Two airlines fly to Memphis. according to airport data for the past year, wings airlines planes arrived on time 330 times and were late 60 times. Global airlines planes arrived on time 430 times and were late 50 times.
Please state the steps used to perform a hypothesis test on the coefficient of correlation and provide a detailed example. Details are greatly appreciated!
in order to check to see if the mean body temperature for human differs from 98.6 degree f. in the sample of 50 healthy
You are dealt 2 cards from a shuffled deck of 52 cards, without replacement. There are four suits of 13 cards each in a deck of cards
What is the geometric mean annual increase for the period?
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