Statistics > EXAM > MATH 221 Week 5 quiz. Already Graded A (All)
MATH 221 Week 5 quiz. Already Graded A
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Question 1 2 / 2 pts (CO 4) Consider the following table: Age Group Frequency 18-29 983 30-39 784 40-49 686 50-59 632 60-69 541 70 and over 527 If you created the probability distribution fo... r these data, what would be the probability of 40-49? 0.237 0.425 0.189 Correct! 0.165 Question 2 2 / 2 pts (CO 4) Consider the following table of hours worked by part-time employees. These employees must work in 5 hour blocks. Weekly hours worked Probability 5 0.06 15 0.61 20 0.18 25 0.15 Find the mean of this variable. 18.95 12.20 17.50 Correct! 16.80 Question 3 2 / 2 pts (CO 4) Consider the following table: Defects in batchProbability 0 0.21 1 0.19 2 0.30 3 0.15 4 0.11 5 0.04 Find the variance of this variable. 1.49 1.40 Correct! 1.97 1.88 [Show More]
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