An industrial researcher wants to perform a test with the intent of establishing that this company's compact fluorescent lamp has a mean life greater than 7100 hours. The sample size is 128 and he knows that $\sigma$=79 hours.
Find the numerical value of c so that the test has a 5% level of significance.
A) 7106.98
B) 7107.13
C) 7111.49
D) 7088.51

Question

An industrial researcher wants to perform a test with the intent of establishing that this company's compact fluorescent lamp has a mean life greater than 7100 hours. The sample size is 128 and he knows that $\sigma$=79 hours.
Find the numerical value of c so that the test  has a 5% level of significance.
A) 7106.98 
B) 7107.13 
C) 7111.49 
D) 7088.51

Quizplus · Accepted Answer

The Answer of An industrial researcher wants to perform a test with the intent of establishing that this company's compact fluorescent lamp has a mean life greater than 7100 hours. The sample size is 128 and he knows that $\sigma$=79 hours.
Find the numerical value of c so that the test  has a 5% level of significance.
A) 7106.98 
B) 7107.13 
C) 7111.49 
D) 7088.51

An Industrial Researcher Wants to Perform a Test with the Intent