. If a pilot study reveals the mean size of homes in a town to be 120 square meters with a standard deviation of 40 square meters, how many homes would have to be sampled if we wanted our estimate of the mean to be accurate within 5 square meters, 98 times out of 100?
. If a pilot study reveals the mean size of homes in a town to be 120 square meters with a standard deviation of 40 square meters, how many homes would have to be sampled if we wanted our estimate of the mean to be accurate within 5 square meters, 98 times out of 100?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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1. If a pilot study reveals the mean size of homes in a town to be 120 square meters with a standard deviation of 40 square meters, how many homes would have to be sampled if we wanted our estimate of the mean to be accurate within 5 square meters, 98 times out of 100?
2. In a random sample of 200 households that recently visited Intercity Shopping Centre, it is found that 100 also visited the Thunder Centre big box development on the same shopping trip. Using a confidence level of 90 percent, estimate the proportion of shopping trips to Intercity that involve cross shopping at the Thunder Centre.
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