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(a) The number of customers arriving to a restaurant is a Poisson random variable with a mean of 3 customers per hour. Find the probability that: i. 6 customers will arrive in an hour. i. less than 2 customers will arrive in 30 minutes. iiI. at least 3 customers will arrive in 30 minutes. (b) The average weight of 600 students who were taking IQ test was 38.20 kg with a standard deviation of 15.32 kg. Let be the average weight for a random sample of certain students selected from this school. Find the mean and standard deviation of x for a sample size of: i. 7. i. 480.

(a) The number of customers arriving to a restaurant is a Poisson random variable with a mean of 3 customers per hour. Find the probability that: i. 6 customers will arrive in an hour. i. less than 2 customers will arrive in 30 minutes. iiI. at least 3 customers will arrive in 30 minutes. (b) The average weight of 600 students who were taking IQ test was 38.20 kg with a standard deviation of 15.32 kg. Let be the average weight for a random sample of certain students selected from this school. Find the mean and standard deviation of x for a sample size of: i. 7. i. 480.

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Statistics and Probabilities

(a) The number of customers arriving to a restaurant is a Poisson random variable with a mean of 3 customers per hour. Find the probability that: i. 6 customers will arrive in an hour. i. less than 2 customers will arrive in 30 minutes. ii. at least 3 customers will arrive in 30 minutes. (b) The average weight of 600 students who were taking IQ test was 38.20 kg with a standard deviation of 15.32 kg. Let i be the average weight for a random sample of certain students selected from this school. Find the mean and standard deviation of x for a sample size of: i. 7. i. 480.
Transcribed Image Text:(a) The number of customers arriving to a restaurant is a Poisson random variable with a mean of 3 customers per hour. Find the probability that: i. 6 customers will arrive in an hour. i. less than 2 customers will arrive in 30 minutes. ii. at least 3 customers will arrive in 30 minutes. (b) The average weight of 600 students who were taking IQ test was 38.20 kg with a standard deviation of 15.32 kg. Let i be the average weight for a random sample of certain students selected from this school. Find the mean and standard deviation of x for a sample size of: i. 7. i. 480.
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