A survey was done at a beach. Since more people needed help from lifeguards ondays when more ice cream was sold, the conclusion was that ice cream causespeople to need assistance from a lifeguard. Suggest two reasons why this conclusionmay not be accurate. An art gallery asked people whether they preferred paintings of winter mountains orlakes at sunset. 78% of those surveyed said they preferred the sunset paintings. Themargin of error is 7%, 19 times out of 20.a) Explain what the last sentence means. (2 marks)b) Can we say with certainty that the most popular sort of painting is a painting of asunset? Explain. (2 marks)

Answered: A survey was done at a beach. Since…

Calculus: Early Transcendentals

8th Edition

ISBN:9781285741550

Author:James Stewart

Publisher:James Stewart

Chapter1: Functions And Models

Section: Chapter Questions

Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...

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Suppose you are the master of the mint. If you sample 200 coins and the king has set the error tolerance at 1 ounce for individual coins, and each coin should weight 1 ounce. What is the error in the sum of the 200 coins. Round to two places.
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Several years ago, the Arcadia school system was criticized because the average Arcadia High School graduate could read at only the ninth-grade level. After this report was made, a special reading program was established to upgrade skills. The AHS principal wants to know if the reading program worked. If it has, he will request that an accreditation team visit the school. If the program has not improved the reading level to at least 10.0 (sophomore level), the administrator would like to avoid the embarrassment of a poor review. To determine the average reading level of the senior class, we select ten seniors at random. We assume that reading scores are normally distributed. The reading scores for the ten seniors are shown in Table 1. Table 1: Reading Scores for Sample High School Seniors Student Reading Score 1 13.4 2 12.1 3 11.4 4 10.6 5 10.3 6 10.2 7 9.8 8 9.7 9 9.4 10 8.6 Calculate the sample mean…
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A survey was done at a beach. Since more people needed help from lifeguards on days when more ice cream was sold, the conclusion was that ice cream causes people to need assistance from a lifeguard. Suggest two reasons why this conclusion may not be accurate.