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3) Common Sense Media surveyed 1000 teens and 1000 parents of teens to learn about how teens are using social networking sites such as Facebook and MySpace. The two samples were independently selected and were chosen in a way that makes it reasonable to regard them as representative of American teens and parents of American teens. a) When asked if they check their online social networking sites more than 10 times a day, 220 of the teens surveyed said yes. When parents of teens were asked if their teen checked his or her site more than 10 times a day, 40 said yes. Use a significance level of 0.01 (1%) to carry out a hypothesis test to determine if there is convincing evidence that the proportion of all parents who think their teen checks a social networking site more than 10 times a day is less than the proportion of all teens who report that they check more than 10 times a day. Let pi be the proportion of teens who report that they check a social networking site more than 10 times a day. Carefully state your hypotheses. Look at your formula sheet and read the question carefully. I have given you the null hypothesis. a) Ho: p1 p2 =0w Ha: where pi is the proportion of teens who report that they check a social (aq) networking site more than 10 times a day p2 is the proportion of parents who think that their teen checks a social networking site more than 10 times a day b) Calculate the test statistic. Put the proper data into you calculator and run the test. ioq Test Statistic value: (4 decimals) What type of test did you use? c) P value: indW (ale) alias tagrot l'a bong al labor aciszorgen aidi se pov bland? (C) b d) Interpret your results: (p-value vs alpha, reject/fail to reject Ho)

3) Common Sense Media surveyed 1000 teens and 1000 parents of teens to learn about how teens are using social networking sites such as Facebook and MySpace. The two samples were independently selected and were chosen in a way that makes it reasonable to regard them as representative of American teens and parents of American teens. a) When asked if they check their online social networking sites more than 10 times a day, 220 of the teens surveyed said yes. When parents of teens were asked if their teen checked his or her site more than 10 times a day, 40 said yes. Use a significance level of 0.01 (1%) to carry out a hypothesis test to determine if there is convincing evidence that the proportion of all parents who think their teen checks a social networking site more than 10 times a day is less than the proportion of all teens who report that they check more than 10 times a day. Let pi be the proportion of teens who report that they check a social networking site more than 10 times a day. Carefully state your hypotheses. Look at your formula sheet and read the question carefully. I have given you the null hypothesis. a) Ho: p1 p2 =0w Ha: where pi is the proportion of teens who report that they check a social (aq) networking site more than 10 times a day p2 is the proportion of parents who think that their teen checks a social networking site more than 10 times a day b) Calculate the test statistic. Put the proper data into you calculator and run the test. ioq Test Statistic value: (4 decimals) What type of test did you use? c) P value: indW (ale) alias tagrot l'a bong al labor aciszorgen aidi se pov bland? (C) b d) Interpret your results: (p-value vs alpha, reject/fail to reject Ho)

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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3) Common Sense Media surveyed 1000 teens and 1000 parents of teens to learn about how teens are using social networking sites such as Facebook and MySpace. The two samples were independently selected and were chosen in a way that makes it reasonable to regard them as representative of American teens and parents of American teens.
Transcribed Image Text:3) Common Sense Media surveyed 1000 teens and 1000 parents of teens to learn about how teens are using social networking sites such as Facebook and MySpace. The two samples were independently selected and were chosen in a way that makes it reasonable to regard them as representative of American teens and parents of American teens.
a) When asked if they check their online social networking sites more than 10 times a day, 220 of the teens surveyed said yes. When parents of teens were asked if their teen checked his or her site more than 10 times a day, 40 said yes. Use a significance level of 0.01 (1%) to carry out a hypothesis test to determine if there is convincing evidence that the proportion of all parents who think their teen checks a social networking site more than 10 times a day is less than the proportion of all teens who report that they check more than 10 times a day. Let pi be the proportion of teens who report that they check a social networking site more than 10 times a day. Carefully state your hypotheses. Look at your formula sheet and read the question carefully. I have given you the null hypothesis. a) Ho: p1 p2 =0w Ha: where pi is the proportion of teens who report that they check a social (aq) networking site more than 10 times a day p2 is the proportion of parents who think that their teen checks a social networking site more than 10 times a day b) Calculate the test statistic. Put the proper data into you calculator and run the test. ioq Test Statistic value: (4 decimals) What type of test did you use? c) P value: indW (ale) alias tagrot l'a bong al labor aciszorgen aidi se pov bland? (C) b d) Interpret your results: (p-value vs alpha, reject/fail to reject Ho)
Transcribed Image Text:a) When asked if they check their online social networking sites more than 10 times a day, 220 of the teens surveyed said yes. When parents of teens were asked if their teen checked his or her site more than 10 times a day, 40 said yes. Use a significance level of 0.01 (1%) to carry out a hypothesis test to determine if there is convincing evidence that the proportion of all parents who think their teen checks a social networking site more than 10 times a day is less than the proportion of all teens who report that they check more than 10 times a day. Let pi be the proportion of teens who report that they check a social networking site more than 10 times a day. Carefully state your hypotheses. Look at your formula sheet and read the question carefully. I have given you the null hypothesis. a) Ho: p1 p2 =0w Ha: where pi is the proportion of teens who report that they check a social (aq) networking site more than 10 times a day p2 is the proportion of parents who think that their teen checks a social networking site more than 10 times a day b) Calculate the test statistic. Put the proper data into you calculator and run the test. ioq Test Statistic value: (4 decimals) What type of test did you use? c) P value: indW (ale) alias tagrot l'a bong al labor aciszorgen aidi se pov bland? (C) b d) Interpret your results: (p-value vs alpha, reject/fail to reject Ho)
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