Answer:
The answer is "(0.727, 1.573)".
Step-by-step explanation:
The confidence interval of 98 percent is C.I = (0.727, 1.573). You might disregard the statement of the experts that the genuine average duration in California of earthquakes is 0.5 minutes.
![C.I = \bar{x}\pm t_{\frac{\alpha }{2}}\times \frac{s }{\sqrt{n}}\\\\](https://tex.z-dn.net/?f=C.I%20%3D%20%5Cbar%7Bx%7D%5Cpm%20t_%7B%5Cfrac%7B%5Calpha%20%7D%7B2%7D%7D%5Ctimes%20%5Cfrac%7Bs%20%7D%7B%5Csqrt%7Bn%7D%7D%5C%5C%5C%5C)
![= 1.15 + 3.365 \times 0.12574\\\\= 1.15 + 0.4231\\\\= (0.7269, 1.5731)](https://tex.z-dn.net/?f=%3D%201.15%20%2B%203.365%20%5Ctimes%200.12574%5C%5C%5C%5C%3D%201.15%20%2B%200.4231%5C%5C%5C%5C%3D%20%280.7269%2C%201.5731%29)
Answer:go to mathpapa they literally solve any problem without ads
Step-by-step explanation:
If you're asking us to solve for Z...
z² + 11z = -21/4
4z² + 44z + 21 = 0
Enter... *drumroll* the quadratic equation!
![z = \frac{-b +- \sqrt{b^{2}-4ac}}{2a}](https://tex.z-dn.net/?f=z%20%3D%20%5Cfrac%7B-b%20%2B-%20%5Csqrt%7Bb%5E%7B2%7D-4ac%7D%7D%7B2a%7D%20)
(that's a plus or minus, sorry)
![z = \frac{-44 +- \sqrt{44^{2}-4(4)(21)}}{2(4)}](https://tex.z-dn.net/?f=z%20%3D%20%5Cfrac%7B-44%20%2B-%20%5Csqrt%7B44%5E%7B2%7D-4%284%29%2821%29%7D%7D%7B2%284%29%7D%20)
x = -0.5 or -10.5
Does this help? Is it too complicated? Do you have any questions?
Answer:
50 miles
Step-by-step explanation:
let he hiked a,b,c and d miles on each of the four days respectively.
then, according to the question.
a+b=26...i
b+c= 24...ii
c+d=28...iii
a+c=22...iv
now, adding i,ii,iii,iv we get
2(a+b+c+d) = 100
a+b+c+d= 50 miles.
Hence, he traveled in all 50 miles.
The conversion answer is 23325