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Q1. In a recent study of 154 households, 54 had air conditioning. Find the 95% confidence interval of the true proportion who have air conditioning.
Q2. Mr. Hoyack, and Dr. Jensen wish to estimate, within 0.05%, the true proportion of Cochise College students who study at least 3 hours each school night and they want to be 99% confident.
a) How large a sample is necessary if a study two years ago showed that 65% of 450 students studied at least 3 hours each school night?
b) If no estimate of the sample proportion is available, how large should the sample be?
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
MATH1550H: Assignment: Question: what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
MATH1550H: Assignment:Questions: (Genetics) What is the probability that at most two of the offspring are aa?
MATH1550H: Assignment: Questions: Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.
Caselet on McDonald’s vs. Burger King - Waiting time
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Problems on Sampling Variability and Standard Error and Confidence Intervals
Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find out the probability
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