Suppose a processing plant will close down a production line for maintenance if the average length of time a robot welder takes to complete the weld is not 1.919 minutes. You want to test whether the production line should be closed for maintenance. a. What is the appropriate null hypothesis? b. What is the appropriate alternative hypothesis?

Null Hypothesis : Average Weld Time = 1.919 ;

Alternate Hypothesis : Average Weld Time ≠  1.919

Explanation:

Null Hypothesis is a neutral 'no effect' hypothesis, signifying no relationship between variables.

Alternate Hypothesis is reverse of Null Hypothesis , signifying effect & relationship between variables.

Given Case : Production Line Closed - If average weld time used by robot ≠ 1.919 ; Production Line not Closed - If average weld time used by robot = 1.919

Null Hypothesis : Average Weld Time = 1.919 ;

Alternate Hypothesis : Average Weld Time ≠  1.919

abolish

do away with

unanimous

in complete agreement

secede

separate; break free

inauguration

starting a new position with a formal ceremony.

cooperationist

people who wanted the north to cooperate with the south

surrender

to give up

volunteer

perform a service for free

draft

involuntary service in military

retreat

withdraw; move away from enemy

advisor

expert who gives advice

explanation: