Answer:
Step-by-step explanation:
39²=1521
80²=6400
39²+80²=1521+6400=7921
87²=7569
7921≠7569
so it is not aright angled triangle.
Answer:
95% confidence interval for the mean μ is (6,14)
The Population mean μ lies between ( 6, 14 )
Step-by-step explanation:
<u><em>Explanation</em></u>:-
Given random sample 'n' = 1200
95% confidence interval for the mean μ is determined by
![(x^{-} -Z_{\alpha } \frac{S.D}{\sqrt{n} } , x^{-} +Z_{\alpha } \frac{S.D}{\sqrt{n} } )](https://tex.z-dn.net/?f=%28x%5E%7B-%7D%20-Z_%7B%5Calpha%20%7D%20%5Cfrac%7BS.D%7D%7B%5Csqrt%7Bn%7D%20%7D%20%2C%20x%5E%7B-%7D%20%2BZ_%7B%5Calpha%20%7D%20%5Cfrac%7BS.D%7D%7B%5Csqrt%7Bn%7D%20%7D%20%29)
Level of significance = 95% 0r 0.05
Z₀.₀₅ = 1.96
= 10 ± 4
Mean of the small sample = 10
95% of confidence intervals are
( 10 ±4 )
( 10 -4 , 10+4)
( 6 , 14 )
95% confidence interval for the mean μ lies between ( 6, 14 )
Answer:
Step-by-step explanation:
Just plug in 20 for t:
![f(20)=\frac{60*20}{20^2+46}=\frac{1200}{400+46}=\frac{1200}{446}=2.69058](https://tex.z-dn.net/?f=f%2820%29%3D%5Cfrac%7B60%2A20%7D%7B20%5E2%2B46%7D%3D%5Cfrac%7B1200%7D%7B400%2B46%7D%3D%5Cfrac%7B1200%7D%7B446%7D%3D2.69058)
Answer:
143
Step-by-step explanation:
17300=.965(125X)
17927.46=125X
143.41=X
Ricardo is not correct because the temperature is actually getting colder (idk if I need to explain it more). The difference is -12 F