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

answer; i believe the correct answer is (117);

hi there!

moors is essentially another word for muslims.

the moors invaded spain around year 700, during their time ruling spain the muslims promoted religious tolerance (moors tolerated jews who were viewed as outcasts by northerners), the moors as well had a great impact on their language, and architecture (palaces were created).

i hope this !