Answer:
The proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars is 0.0099
Step-by-step explanation:
A set of electric toothbrush prices are normally distributed with a mean of 87 dollars and a standard deviation of 8 dollars.
![Mean = \mu = 87](https://tex.z-dn.net/?f=Mean%20%3D%20%5Cmu%20%3D%2087)
Standard deviation = ![\sigma = 8](https://tex.z-dn.net/?f=%5Csigma%20%3D%208)
We are supposed to find proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars i.e.P(104.60<x<108.20)
![Z=\frac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=Z%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
At x = 104.60
![Z=\frac{104.60-87}{8}](https://tex.z-dn.net/?f=Z%3D%5Cfrac%7B104.60-87%7D%7B8%7D)
Z= 2.2
At x=108.20
![Z=\frac{108.20-87}{8}](https://tex.z-dn.net/?f=Z%3D%5Cfrac%7B108.20-87%7D%7B8%7D)
Z= 2.65
Refer the z table for p value :
P(x<108.20)-P(x<104.60)=P(Z<2.65)-P(Z<2.2)=0.9960-0.9861=0.0099
Hence The proportion of electric toothbrush prices are between 104.60 dollars and 108.20 dollars is 0.0099
Answer:
I know this isn't a real question,but you would have 11 dead bodies,I think
Step-by-step explanation:
Answer: Its B
Step-by-step explanation: Hope this was helpful I am not to sure this is the right answer but let me know if it is
ANSWER:
Domain: {3, 7, 4, a}
Range: {a, b, 4, 0}
Answer:
3hr 30min
Step-by-step explanation:
3hr 30min