Answer:
Step-by-step explanation:
We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean
For the null hypothesis,
µ = 12
For the alternative hypothesis,
µ < 12
Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is
z = (x - µ)/(σ/√n)
Where
x = sample mean
µ = population mean
σ = population standard deviation
n = number of samples
From the information given,
µ = 12 minutes
x = 8 minutes
σ = 12 minutes
n = 36
z = (8 - 12)/(12/√36) = - 4/2 = - 2
Test statistic = - 2
Answer:
Step-by-step explanation:
Formula =P×R×T=I
P×11/100×6=4500
66/100p=4500
100/66×66/100=4500×100/66
P=6818.1818.......
=6818.18
1. intersecting lines
<span>2. never</span>
Answer:
It depends on the shape
Step-by-step explanation:
For a rectangle: length x height
For a triangle: base x height, then divide the answer by 2
For a circle: π x (diameter / 2)^2
