1. if a bag contains three white,two black,and four red balls and four balls are drawn at random woth replacement what is the probablities that the sample contains just one white ball given that it contains just one red ball? 2. 平均看电视time 平均看书的时间 低於1小时 1~2小时 超过2小时 低於2小时 90人 85人 130人 高於2小时 655人 32人 8人 共1000人 (1)if the null hypothesis of no connection between time spent watching TV and time spent reading storybooks is true, how many children watching less than 2 hours of tv and readingno more than 2 hours of storybooks on average can we expect? (2)to test whether there is any relationahip between average time spent watching tv and average reading storybooks the value of the measured tset statistic is? a.481.49 b.1368.06 c.-1259 d.1.61 (3) we want to test whether there is any relationship between average time spent watching TV and average time spent reading storybooks soppose the value of the test statistic was 164 (which is not correct answer)and the critical value was 19 (which one is not correct answer) then we could conclude that a.there is connection between that b.there is not connection between that --

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