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Question 1 The table below summarises the results of a survey of online computer gamers, which included questions on the type of network connection...

mathematical statistical questions found in attachment, need all 17 complete, working optional,

Question 1 The table below summarises the results of a survey of online , computer gamers which included questions on the type of ( - , ) network connection used dial up ADSL or cable and the ( , performance level of the respondent s hardware classified as low , ). ( : medium high or extreme Note very few respondents indicated , low hardware performance so this group was combined with the .) medium group net connection \ hardware / low medium high extreme Total - dial up 9 5 1 15 ADSL 17 22 10 49 cable 5 10 6 21 Total 31 37 17 85 To carry out a statistical test to assess whether there is any evidence of a relationship between hardware performance and , connection type what is the null hypothesis? Answer Hardware Performance and Connection type are dependent Hardware Performance and Connection type are independent The mean Hardware Performance for all Connection Types are equal The mean Hardware Performance for all Connection Types are not equal Question 2 What is the expected number of ADSL users with computers in the extreme category? Answer Question 3 Given that the expected number of cable users with computers in the / low medium . , category is 7 66 calculate the corresponding term in the test statistic? Answer Question 4 Which distribution tables should be used when looking up the ( , test statistic for this test including the degrees of freedom if ) relevant ? Answer
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Chi-Squared tables with 4 degrees of freedom Chi-Squared tables with 3 degrees of freedom Chi-Squared tables with 2 degrees of freedom Standard Normal table with 4 degrees of freedom Question 5 If the - p value for the test is determined to be approximately . , 0 214 what conclusion would you draw? Answer There is strong evidence that hardware performance is dependent on connection type There is slight evidence that hardware performance is . independent of connection type There is insufficient evidence that hardware performance is . dependent on connection type There is not enough information given to enable a conclusion to be drawn . Question 6 A claim has been made that an ADSL user is twice as likely to be using hardware in the high category than in the extreme category but equally likely to be using hardware in the / low medium or high . categories A statistical test is to be carried out to assess this claim . What is the null hypothesis for this test ? Answer For ADSL users, an equal proportion use low/medium, high hardware and extreme hardware. For ADSL users, 40% use low/medium hardware, 20% use high hardware and 40% use extreme hardware. For ADSL users, 20% use low/medium hardware, 40% use high hardware and 40% use extreme hardware. For ADSL users, 40% use low/medium hardware, 40% use high hardware and 20% use extreme hardware. Question 7 , For the test of Question 6 calculate the expected number of ADSL users with hardware in the high category Answer Question 8 Which distribution tables should be used when looking up the ( test statistic for this test from Question 6 including the degrees , ) of freedom if relevant ?
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Question 1
The table below summarises the results of a survey of online
computer gamers, which included questions on the type of
network connection used (dial-up, ADSL or cable) and the
performance...

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