The time for an operator to complete a task is normally distributed with a mean of 9.5 minutes and a standard deviation of 0.6 minutes. the production order for the day requires this task be completed 47 times. a) determine the probability distribution for the total time to complete all 47 tasks. give the name of the distribution and its parameter(s). b) the production manager has promised this job will be complete at the end of the day. what is the probability the operator does not complete all 47 tasks by the end of the day? assume a work day is 7.5 hours accounting for breaks. c) the operations manager disagrees with the production manager. she believes the time to complete the task is better modeled with the 2-parameter weibull distribution with  = 111.5 and  = 449.2 mins. now what is the probability the operator does not complete all 47 tasks by the end of the day?

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Identify the number as a rational or irrational.explai. 291.87

The survey of study habits and attitudes (ssha) is a psychological test that measures the motivation, attitude toward school, and study habits of students, scores range from 0 to 200. the mean score for u.s. college students is about 115, and the standard deviation is about 30. a teacher who suspects that older students have better attitudes toward school gives the ssha to 55 students who are at least 30 years of age. the mean score is 113.2. assume the population standard deviation is 30 for older students what is the margin of error for a 95% confidence interval for the population mean score for a. older students? b. compute the 95% confidence interval for the population mean score for older students. c. compute the 99% confidence interval for the population mean score for older students. d. compute the 88% confidence interval for the population mean score for older students.