Question: The article Kids Digital Day: Almost 8 Hours (USA Today, January 20, 2010) summarized results from a national survey of 2002 Americans age 8 to

The article “Kids Digital Day: Almost 8 Hours” (USA Today, January 20, 2010) summarized results from a national survey of 2002 Americans age 8 to 18. The sample was selected in a way that was expected to result in a sample representative of Americans in this age group.
a. Of those surveyed, 1321 reported owning a cell phone. Use this information to construct and interpret a 90% confidence interval estimate of the proportion of all Americans age 8 to 18 who own a cell phone.
b. Of those surveyed, 1522 reported owning an MP3 music player. Use this information to construct and interpret a 90% confidence interval estimate of the proportion of all Americans age 8 to 18 who own an MP3 music player.
c. Explain why the confidence interval from Part (b) is narrower than the confidence interval from Part (a) even though the confidence level and the sample size used to compute the two intervals was the same.

Step by Step Solution

★★★★★

3.31 Rating (157 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a Check of Conditions 1 Since np 20021321 2002 1321 10 and n 1 p 2002681 2002 681 10 the sample size ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

536-M-S-R-S (175).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

The trial balances before and after adjustment for Carla Vista Company at the end of its fiscal year are presented below. CARLA VISTA COMPANY Trial Balance August 31, 2022 Before Adjustment...

The article Televisions Value to Kids: Its All in How They Use It (Seattle Times, July 6, 2005) described a study in which researchers analyzed standardized test results and television viewing habits...

The article Plugged In, but Tuned Out (USA Today, January 20, 2010) summarizes data from two surveys of kids age 8 to 18. One survey was conducted in 1999 and the other was conducted in 2009. Data on...

The article Rinse Out Your Mouth (Associated Press, March 29, 2006) summarized results from a survey of 1001 adults on the use of profanity. When asked How many times do you use swear words in...

11.5 The article Plugged In, but Tuned Out (USA Today, January 20, 2010) summarizes data from two surveys of kids age 8 to 18. One survey was conducted in 1999 and the other was conducted in 2009....

Please show how to solve in SPSS with detailed steps. The following: The article "Plugged In, but Tuned Out" (USA Today, January 20, 2010) summarizes data from two surveys of kids age 8 to 18. One...

** using SPSS 11.5 The article "Plugged In, but Tuned Out" (USA Today, January 20, 2010) summarizes data from two surveys of kids age 8 to 18. One survey was conducted in 1999 and the other was...

Final PDF to printer MHE-FTR-018 0077645065 BRE T T P. MAT HE RNE S T E VE GOVE DAVI D T HORNBL AD The Movie Exhibition Industry 2013 IT IS APT that 2012's top-grossing film was The Avengers, because...

thanks tutors:- Two proposed computer mouse designs were compared by recording wrist extension in degrees for 24 people who each used both mouse types ("Comparative Study of Two Computer Mouse...

1. If extreme values occur in the data set, which of the following measures of central tendency are the most appropriate A. B. C. D. E. 2. The The The The The mean median mode variance standard...

Consider again the data in Problem 4. a. How would you compute appropriate cross-product variables to allow testing of whether an interaction exists between age and faculty rank? b. State the...

Why is the pH of distilled water usually 7? How can you prevent this from happening?

Consider the following series. n = 1 ( - 1 ) n n l n ( n 4 ) Find the following limit . ( If the limit is infinite, enter ' ' or ' - ' , as appropriate. If the limit does not otherwise exist, enter...

Discussing this chapter, a classmate says, Since elements that form cations are metals and elements that form anions are nonmetals, elements that do not form ions are metalloids.Do you agree or...

You are completing the audit of Harbour Bicycles Ltd. (HBL) for the year ended December 31, 2019. Your substantive analytical procedures identify an anomaly in the capital asset accounts and, upon...

Consider the hypothesis that stress at work causes family conflict at home. a. What type of relationship is proposed (e.g., positive linear, negative linear)? b. Graph the proposed relationship. c....

Select a cluster of 10 states, and compute the mean number of electoral votes for the sample. Compare this mean with the population mean. States and number of electoral votes for each AL GA 16 AK 3...

The story of Altair BASIC highlights a clash between those who see software as some-thing to be developed and freely shared among computer enthusiasts and those who see software development as an...

The direct method of calculating cash flows from operations is encouraged by the FASB and is the predominant method used.true or false.

In a random sample of U.S. adults surveyed in December 2011, Pew research asked how important it is to you personally to be successful in a high-paying career or profession. Here is a table reporting...

The U.S. Department of Labor (www.bls.gov) collects data on the number of U.S. workers who are employed at or below the minimum wage. Here is a table showing the number of hourly workers by Age and...

The Motion Picture Association of America studies the ethnicity of moviegoers to understand changes in the demographics of moviegoers over time. Here are the numbers of moviegoers (in millions)...

You are analyzing a project that plans to invest $ 2 0 million in a new theme park called "Bonehead Park", based upon the infamous cartoon on MTV , Beavis and Butthead. The park will take two years...

Problem 9-9 Consider the following table, which gives a security analyst's expected return on two stocks for two particular market returns: Market Return Aggressive Stock Defensive Stock 5% 3% 3% 23...

Adler Enterprises is considering a project that has the following cash flow and WACC data. What is the projects NPV? WACC: 10.00% Year: 0 1 2 3 Cash flows: $950 $520 $546 $572 A. $403.72 B. $378.65...