How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.5 minutes per piece? The goal is to estimate the mean time per piece to within 0.4 minutes, with a confidence of 95.5 percent. (Do not round intermediate calculations, Round up your final answer to the next whole number.) Answer is complete but not entirely correct. Number of observations 31

Q: L(1-a) ( In =) dz 4 1 L6(1-2) ( In =) dr

A:

Q: I need help with 9

A: Given

Q: Simplify. х+4 4x + 24 3 X + 6x *2

A:

Q: I need help with 13

A: By Mean value theorem, if a function f is differentiable on a, b, then there exist c∈a, b such that…

Q: what is the correct answer

A: To calculate a one-proportion test or confidence interval, certain assumptions must be satisfied.…

Q: Answer number 4

A:

Q: Find 140 70 2

A: We have to find angle

Q: I need help with 6b

A:

Q: What is the correct answer

A:

Q: b. P(x > 49000) = P(z > + )3D %3D c. There is a(n) % chance that the mean salary of a random sample…

A: Hello thank you for the question, As you have mentioned question number b & c, answering only…

Q: Answer number 2

A: Use property of logarithms