Referring to the table, how many researchers in the survey spent less than 2 hou

Question

Referring to the table, how many researchers in the survey spent less than 2 hours surfing the internet and no more than 2 hours reading articles on average? Researchers complain that they spend fewer time reading related articles and spend more time surfing the internet for certain scientific information. A survey of 1,000 researchers reveals the following information on average time spent searching the internet and average time spent reading articles. Average Time Spent Reading Related Articles Average Time Surfing the Internet Less than 1 hour Between 1 and 2 hours More than 2 hours Less than 2 hours 90 85 130 More than 2 hours 655 32 8

Explanation / Answer

number of researchers in the survey spent less than 2 hours surfing the internet and no more than 2 hours reading articles on average = 227.225 +35.685 = 262.91

TS = 481.4879 >> critical value

there is sufficent evidence that

they spend fewer time reading related articles and spend more time surfing the internet for certain scientific information.

c1 c2 c3 sum r1 90 85 130 305 r2 655 32 8 695 sum 745 117 138 1000 Eij 1 2 3 expected 1 227.225 35.685 42.09 2 517.775 81.315 95.91 0i 90 85 130 655 32 8 Ei 227.225 35.685 42.09 517.775 81.315 95.91 sum (Oi-Ei)^2/Ei 82.87249 68.15102 183.6106 36.3685 29.908 80.57729 481.4879

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