Suppose the mean balance of checking accounts at Regions Bank is known to be 4320. A random sample ...

Suppose the mean balance of checking accounts at Regions Bank is known to be 4320. A random sample of 10 accounts yields a total of 41,490. This means the sampling error is -171.
 
  Indicate whether the statement is true or false

Q. 2

A(n) ________ is a forecast statistic that is restricted to fall within a specified lower and upper bound.
 
  A) objective
  B) requirement
  C) decision variable
  D) permutation

Q. 3

A machine that is used to fill soda pop cans with pop has an adjustable mean fill setting, but the standard deviation is not supposed to exceed 0.18 ounces.
 
  To make sure that this is the case, the managers at the beverage company each day select a random sample of n = 6 cans and measure the fill volume carefully. In one such case, the following data (ounces per can) were observed.12.29 11.88 12.03 12.22 11.76 11.98Based on these sample data, the test statistic is approximately 2 = 5.01. Indicate whether the statement is true or false

Q. 4

A large Midwestern university is interested in estimating the mean time that students spend at the student recreation center per week. A previous study indicated that the standard deviation in time is about 40 minutes per week.
 
  If the officials wish to estimate the mean time within  10 minutes with a 90 percent confidence, what should the sample size be?A) 44
  B) 62
  C) 302
  D) Can't be determined without knowing how many students there are at the university.

Q. 5

For Super Soil, the lower specification fill weight is 35.0 pounds and the upper specification fill weight is 35.5 pounds. The filling process has a standard deviation of 0.4 pounds and the process is in control. Find the process capability index.
 
  A) 0.208
  B) 1.25
  C) 88.75
  D) 0.1