Match the following. 1. a number; a term containing no variables
term
2.
one term or multiple terms connected by an addition or
subtraction sign
constant
3. an expression that uses variables to state a rule
expression
4.
a number or a variable, or the product of a number and
variable(s)
formula
5. a letter or symbol used to represent an unknown number
variable

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.