Mathematics, 18.12.2019 05:31, Tetto
The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000. the ship building association wishes to find out whether their welders earn more or less than $20,000 annually. the alternate hypothesis is that the mean is not $20,000. if the level of significance is 0.10, what is the critical value?
1.65
1.28
±1.28
±1.65
Answers: 1
Mathematics, 21.06.2019 22:30, tdyson3p6xvtu
60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?
Answers: 1
The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000...
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