Answer: 90% confidence interval is (25.8,30.2).
Step-by-step explanation:
Since we have given that
n = 5
Mean = 28
Standard deviation = 3
It is a 90% confidence interval , so, z = 1.64
We need to find the interval.
so, it would be
Hence, 90% confidence interval is (25.8,30.2).
Has to be 128, that’s 80 times 1.6 but I’m lazy and 80 times 2 would be 160... so it’s 128
the ball thrown off course was ° .
<u>Step-by-step explanation:</u>
Here we have , A ball is dropped from the top of a 45 foot building. Once the ball is released, a gust of wind blows the ball off course and is dropped 4 feet from the base of the building. We need to find that How many degrees was the ball thrown off course? Let's find out:
Basically above given condition is a case of right angled triangle with following parameters
x = angle between Perpendicular & base
Now ,
⇒
⇒
Taking tan inverse both sides , in order to obtain x :
⇒
⇒
⇒
⇒ °
Therefore, the ball thrown off course was ° .
The answer is:
2 1/6
Hope this helped :)