Answer:
a) 471.5 kilo-watt hours.
b) 31.76 kilo-watt hours
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean
and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For the population:
Mean 471.5 kilo-watt hours.
Standard deviation of 187.9 kilowatt-hours.
For the sample:
Sample size of 35, by the Central Limit Theorem:
a) Mean
471.5 kilo-watt hours.
b) Standard deviation

31.76 kilo-watt hours
Answer:
point A ON THE LINE PQ is ( 11,16,20)
Step-by-step explanation:
GIVEN DATA:
P (3,2, -2)
Q(7,9,9)
SUPPOSE point A has a cordintates (x,y,z)
given that AP = 2AQ
Q is midpoint of AP
So we have
x+3 = 14.........1
y+2= 18..........2
z-2 =18...........3
x = 11 from equation 1
y = 16 from equation 2
z = 20 from equation 3
Therefore point A ON THE LINE PQ is ( 11,16,20)
Answer: a,b,d
Step-by-step explanation:
Answer:
4+1m?? I’m pretty sure
Step-by-step explanation:
Don't be afraid of the inequality signs. pretend like it is an equal sign until you get your answer. then just switch the signs