Answer:
1.05 ± 0.05 lbs
Step-by-step explanation:
Hi!
We can calculate this interval with the z-score of the 90% which is (by convention) 1.645
The interval is calculated as follows:
![x_m \pm 1.654(\frac{\sigma}{\sqrt n})](https://tex.z-dn.net/?f=x_m%20%5Cpm%201.654%28%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%20n%7D%29)
where x_m is the mean, σ the standar deviation and n is the number of samples:
replacing these values we get:
![1.05 \pm (1.645 \times \frac{0.23}{\sqrt 65})\\1.05 \pm 0.046](https://tex.z-dn.net/?f=1.05%20%5Cpm%20%281.645%20%5Ctimes%20%5Cfrac%7B0.23%7D%7B%5Csqrt%2065%7D%29%5C%5C1.05%20%5Cpm%200.046)
*rounded to the first decimal*
1.05 ± 0.05
Answer:
undefined
Step-by-step explanation:
To find the slope with two points, use:
![\frac{y 2 - y1}{x2 - x1 }](https://tex.z-dn.net/?f=%5Cfrac%7By%202%20-%20y1%7D%7Bx2%20-%20x1%20%7D%20)
If the zero is on the bottom, the slope is undefined, but if it's on top, it's zero
Hope this helps