Question 1345678910 2 Research shows that 14% of 6th graders in K-6 schools have tried cigarettes and 61% of 7th graders in 8-9 or 7-9 middle schools have tried cigarettes. What is the absolute increase, to the nearest percent? Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code […]
Let R have the Rayleigh density given by f(r) = re^(-1/2*r^2) for r>0. In what follows, Z is standard normal. a) Let F be the cdf of R . Find F(r) for r>0 by writing the integral for it. b) Use the mean and variance of Z to find E(R) without any further integration. c) Use properties of R^2 to find E(R^2) without any further integration, and […]
Pete’s Pizzeria advertises that they will deliver your pizza within 15 minutes of placing an order or it is free of charge. A sample of 25 customers is selected randomly. The average delivery time in the sample was 13 min. with a sample standard deviation of 4 min. We want to know whether Pete’s Pizzeria […]
Assume 7 students are assigned into 3 indistinguishable offices. How many ways can this happen under each condition? 1. assign students into groups of 1, 1, and 5, which means 2 students have their own offices, and the ways can other 5 share an office. 2.assign students into groups of 1, 2, and 4 3.assign […]
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