Answer:
The 95 % confidence interval for the mean is between 28.09 and 35.97.
Step-by-step explanation:
Mean of the sample:
30 values.
So we sum all the values and divide by 30.
The sum of all the values(43 + 52 + 18 + ... + 20 + 41) is 961.
961/30 = 32.03
Confidence interval:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of
.
So it is z with a pvalue of
, so 
Now, find the margin of error M as such

In which
is the standard deviation of the population and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 32.03 - 3.94 = 28.09
The upper end of the interval is the sample mean added to M. So it is 32.03 + 3.94 = 35.97
The 95 % confidence interval for the mean is between 28.09 and 35.97.
Answer: The protons and neutrons.
Answer:
151.43 meters
Step-by-step explanation:
We can use ratios to solve
1.75m 265m
--------------- = -----------
1 m x meters
Using cross products
1.75x = 265*1
Divide each side by 1.75
1.75x/1.75 = 265/1.75
x =151.4285714
151.43 meters
Answer:
C
Step-by-step explanation:
a^2 + b^2 = c^2 so 6^2 + 9^2 = 36 + 81 = square root of 117