A study of n = 2252 adults age 18 or older found that 72% of the cell phone users send and receive text messages.15 A study of n = 800 teens age 12 to 17 found that 87% of the teen cell phone users send and receive text messages. What is the best estimate for the difference in the proportion of cell phone users who use text messages, between adults (defined as 18 and over) and teens? Give notation (as a difference with a minus sign) for the quantity we are trying to estimate, notation for the quantity that gives the best estimate, and the value of the best estimate. Be sure to clearly define any parameters in the context of this situation.

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Q: In elementary statistics, how do you calculate class width? I don't understand it.

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A: The percentage of females in the survey is calculated below:

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Q: The table summarizes results from 985 pedestrian deaths that were caused by automobile accidents.

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Q: Suppose a sample of 158158 tankers is drawn. Of these ships, 135135 did not have spills. Using the…

A: It is given that, among 158 tankers 135 did not have spills.

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A:

Q: coronary bypass surgery: the agency for Healthcare research and quality reported that 53% of people…

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Q: What is the weighted mean of the numbers 10%, 30%, 60%, 70, 86 and 94

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A: Concept of General Addition Rule: For any two events A and B the General Addition Rule state that:

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Q: What is the role of displays in statistics?

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Q: The median age of five people in a meeting is 40 years. One of the people who leaves the room are 60…

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Q: The median of (1,9,8,4) is?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.