Answer:
a) reject null hypothesis since p < 0.01
Step-by-step explanation:
Given that the average assembly time for a Ford Taurus is
[tex]μ = 38 hrs[/tex]
Sample size [tex]n=36[/tex]
[tex]x bar = 37.5\\s=1.2\\SE = 1.2/6 = 0.2[/tex]
Test statistic t = mean diff/se = 0.5/0.2 = 2.5
(Here population std dev not known hence t test is used)
df = 35
p value = 0.008703
a) reject null hypothesis since p < 0.01