5.5 8 2.2 hope this helps love
Answer:
Step-by-step explanation:
Hello!
You need to construct a 95% CI for the population variance of the forces the safety helmets transmit to wearers.
The variable of interest is X: Force a helmet transmits its wearer when an external force is applied (pounds)
Assuming this variable has a normal distribution, the manufacturer expects it to have a mean of μ= 800 pounds and a standard deviation of σ= 40 pounds
A test sample of n=40 was taken and the resulting mean and variance are:
X[bar]= 825 pounds
S²= 2350 pounds²
To estimate the population variance per confidence interval you have to use the following statistic:
And the CI is calculated as:
[;]
[;]
[1577.45; 3867.09] pounds²
Using a confidence level of 95% you'd expect that the interval [1577.45; 3867.09] pounds² contains the value of the population variance of the force the safety helmets transmit to their wearers when an external force is applied.
I hope this helps!
Answer:
C.
Step-by-step explanation:
Also known as left-skewed distribution, a negatively skewed distribution would have data that are more concentrated on the right side. So you would see a longer tail on the left-side of the distribution or curve. You would find the mean to the left of the median of the data.
In the room where you're sitting right now, the angle on the floor
where the bottoms of two walls come together is 90 degrees.