Answer:
center = 98.6, variability = 0.08
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a random variable X, with mean
and standard deviation
, the sample means with size n of at least 30 can be approximated to a normal distribution with mean
and standard deviation ![s = \frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=s%20%3D%20%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
The center is the mean.
So ![\mu = 98.6](https://tex.z-dn.net/?f=%5Cmu%20%3D%2098.6)
The standard deviation of the sample of 50 adults is the variability, so
![s = \frac{0.6}{\sqrt{50}} = 0.08](https://tex.z-dn.net/?f=s%20%3D%20%5Cfrac%7B0.6%7D%7B%5Csqrt%7B50%7D%7D%20%3D%200.08)
So the correct answer is:
center = 98.6, variability = 0.08
Answer:
Solution,
CP of a bicycle=$3000
Marked up=40%
Now,
→40% of $3000
→40/100x$3000
→$1200
→$3000+$1200=$4200
Again,
Discount(d)=30%
→30%of $4200
→30/100x$4200
→$1260
Hence, the discount price of the bicycle is $1260
Step-by-step explanation:
Answer:
2,-1.5
Step-by-step explanation:
To find the midpoint of a line segment, take the average of the x coordinates and y coordinates of the two points that make it up.
![\frac{2+2}{2} ,\frac{4+(-7)}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B2%2B2%7D%7B2%7D%20%2C%5Cfrac%7B4%2B%28-7%29%7D%7B2%7D)
=![\frac{4}{2} , \frac{-3}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B2%7D%20%2C%20%5Cfrac%7B-3%7D%7B2%7D)
![\frac{4}{2} , \frac{-3}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B2%7D%20%2C%20%5Cfrac%7B-3%7D%7B2%7D)
=2,-1.5
Answer:
27pi units^2, or about 81 units^2
Step-by-step explanation:
9^2*pi/3
81*pi/3
about 81 units^2 or
27pi units^2
Answer:
x>3, the last option with the open circle
Step-by-step explanation: