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I asked each of you how many hours you worked the previous week. The average forthe class was 13.89 as mentioned in one lecture. The z-value for a student working 0hours a week was −0.7648678. There were 696 students that took the survey (differentfrom the other table in this test for a couple of reasons). Suppose (contrary to fact)that the distribution of the data is roughly bell shaped. Based on the empirical rulewe will see approximately how many students working 30 or more hours a week? (a) 139 (b) 223 (c) 14 (d) 104 (e) We cannot tell without the standard deviation

/in /by

I asked each of you how many hours you worked the previous week. The average forthe class was 13.89 as mentioned

in one lecture. The z-value for a student working 0hours a week was −0.7648678. There were 696 students that took the survey (differentfrom the other table in this test for a couple of reasons). Suppose (contrary to fact)that the distribution of the data is roughly bell shaped. Based on the empirical rulewe will see approximately how many students working 30 or more hours a week?

(a) 139

(b) 223

(c) 14

(d) 104

(e) We cannot tell without the standard deviation

 
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