Answer:
The 90% confidence interval for the population mean is (300.78, 315.22).
Step-by-step explanation:
We have to calculate a 90% confidence interval for the mean.
The population standard deviation is know and is σ=17.
The sample mean is M=308.
The sample size is N=15.
As σ is known, the standard error of the mean (σM) is calculated as:
The z-value for a 90% confidence interval is z=1.645.
The margin of error (MOE) can be calculated as:
Then, the lower and upper bounds of the confidence interval are:
The 90% confidence interval for the population mean is (300.78, 315.22).
Answer:
a would be 12
Step-by-step explanation:
because there are 5 1's so you would subtract 5 from 65 and get 60 and divide 60 by 5 and get 12
Hope this helps!!! Mark me as brainiest!!!!! :)
Answer: 14-degree decrease
Step-by-step explanation:
because it is getting colder and we know this because anytime temperature goes from positive to negative it becomes mad cold.
Anyways subtracting 14 from our initial temp at 8 degrees celsius brings us to a brisk -6 celsius
Answer:
a & b
Step-by-step explanation:
Supplementary angles add up to 180°
Angles a and b are both on a straight line which the sum is 180°
I hope this helps.