Answer:
[0.9 months, 32.69 months]
Step-by-step explanation:
The mean is
The standard deviation is
Now, we have to find two values a and b such that the area under the Normal curve with mean 16.8 and standard deviation 8.1092 between a and b equals <em>95% = 0.95
</em>
Using a spreadsheet we find these values are
a = 0.906
b = 32.694
<h3>(See picture)
</h3>
and our 95% confidence interval for the mean number of months elapsed since the last visit to a dentist for the population of students participating in the program rounded to two decimal places is
[0.9 months, 32.69 months]
Answer:
$4500
Step-by-step explanation:
it decreases $300 per yeae
Answer:
24 yards
Step-by-step explanation:
Circumference is πd where d is the diameter. You can derive this to isolate diameter by dividing both sides by π
D=C/π Now just plug the numbers for your variables.
D=75.36/3.14
D=24
The diameter is 24 yards
Step-by-step explanation:
![a(b+c-bc)-b(c+a-ac)+c(b-a)](https://tex.z-dn.net/?f=a%28b%2Bc-bc%29-b%28c%2Ba-ac%29%2Bc%28b-a%29)
Distribute over the parenthesis:
![(ab+ac-abc)+(-bc-ab+abc)+(bc-ac)\\ab+ac-abc-bc-ab+abc+bc-ac](https://tex.z-dn.net/?f=%28ab%2Bac-abc%29%2B%28-bc-ab%2Babc%29%2B%28bc-ac%29%5C%5Cab%2Bac-abc-bc-ab%2Babc%2Bbc-ac)
Group like terms:
![(ab-ab)+(ac-ac)+(abc-abc)+(cb-cb)](https://tex.z-dn.net/?f=%28ab-ab%29%2B%28ac-ac%29%2B%28abc-abc%29%2B%28cb-cb%29)
Anything subtracted from itself is 0.
Simplify:
![0+0+0+0\\0](https://tex.z-dn.net/?f=0%2B0%2B0%2B0%5C%5C0)