Twelve different video games showing substance use were observed and the duration of times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample...

Extracted text: Twelve different video games showing substance use were observed and the duration of times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the sample data to construct an 80% confidence interval estimate of o, the standard deviation of the duration times of game play. Assume that this sample was obtained from a population with a normal distribution. 4,787 4,736 4,534 4,592 4,267 4,863 4,693 4,042 3,989 3,862 4,950 4,494 Click the icon to view the table of Chi-Square critical values. sec <>< sec.="" the="" confidence="" interval="" estimate="" is="" se="" (round="" to="" one="" decimal="" place="" as="">


Extracted text: Area to the Aight of the Critical alue Degrees of Degrees of Freedom 0.995 0.99 0.975 0.95 0.90 0.10 0.06 0.025 0.01 0.005 Freedom 0.001 0.004 0.016 2.706 3.841 5.024 6.635 7.879 2 0.010 0.020 0.051 0.103 0.211 4,605 5.991 7.378 9.210 10.597 0.072 0.115 0216 0.352 0.584 6.251 7.815 9.348 11.345 12.838 0207 0.297 0.484 0.711 1,064 7.779 9.488 11.143 13.277 14.860 4. 0.412 0.554 0.831 1.145 1.610 9.236 11.071 12.833 15.006 16.750 5 0.676 0.872 1237 1.635 2204 10.645 12.592 14.449 16.812 18.548 6. 0.999 1.239 1,690 2.167 2.833 12.017 14.067 16.013 18.475 20.278 1.344 1.646 2.180 2.733 3490 13.362 15.507 17.535 20.090 21.955 6. 1.735 2.088 2.700 3.325 4.168 14.684 16.919 19.023 21.686 23.589 10 2.156 2.558 3247 3.940 4.865 15.987 18.307 20.483 23.209 25.188 10 11 2.603 3.053 3.516 4.575 5.578 17.275 19.675 21.920 24.725 26.757 11 12 3.074 3.571 4.404 5.226 6.004 18,549 21.026 23.337 26.217 28.299 12 13 3.565 4.107 5.009 5.892 7042 19.812 22.362 24.736 27.688 29.819 13 14 4.075 4.660 5.629 Б.571 7.790 21.064 23.685 26.119 29.141 31.319 14