A manufacturer of cordless electric shavers sampled 13 from a day's production and found the mean time of continuous usage without recharging to be 410 minutes with a sample standard deviation of 30 minutes. We can assume that times are normally distributed. We wish to test if the true mean operating time without recharging is more than 400 minutes. The correct calculated value of the test statistic is:. A) -1.20.
B) 2.79.
C) -2.52.
D) -0.333.
E) 1.20.

i'm pretty sure its -1.20 to be honest

Step-by-step explanation:

45

step-by-step explanation:

answer

false

explanation

these practices describe the manner the land use outcome is attained. land management methods implemented by corporations are a mandatory because they are a driver for better land use results economically, socially and environmentally. corporations are required to understand the connection between land use , and land management practices to support sustainable land use policies