Answer:
71.70
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given that population average is 0.8 ampere
Sample size = 9
Sample mean x bar = 1.34 A
Sample std dev s = 0.48
![H_o: x bar =0.8\\H_a: x bar >0.8](https://tex.z-dn.net/?f=H_o%3A%20x%20bar%20%3D0.8%5C%5CH_a%3A%20x%20bar%20%3E0.8)
(one tailed test)
Mean difference - ![1.34-0.8 =0.54](https://tex.z-dn.net/?f=1.34-0.8%20%3D0.54)
Std error = ![\frac{s}{\sqrt{n} } =0.16](https://tex.z-dn.net/?f=%5Cfrac%7Bs%7D%7B%5Csqrt%7Bn%7D%20%7D%20%3D0.16)
t test can be used since sigma is not known and sample size small
t statistic = mean diff/std error = 3.5
df = 8
p value = 0.00404
1 yard = 3 feet so 1 yard by 1 yard = 3 x 3 = 9 square feet.. This means that 9 squares that are 3 feet by 3 feet will fit into a square that is 1 yard by 1 yard.
I’m pretty sure it’s C and if I’m wrong I’m very sorry I probably did some math wrong