Help, I need to figure this out.
2 answers:
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Answer:
Mean $1060
Standard error $34.69
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation, which is also called standard error,
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
Population:
Mean $1,060 and standard deviation $190.
Sampling distriution of samples of size 30:
Mean $1060
Standard deviation
Answer: The construction steps are shown below,
1. Place the compass on point V and swing an arc of any size that crosses the line twice.
2. After that stretch the compass larger.
3. Place the compass point on the point where the arc insect the line and draw a small arc above the line.
4. Without changing the span of the compass place the compass point on the other point where the first arc intersect the line and draw a another small arc above the line that will intersects the second arc at point P.
5. Now join the points P and v with the help of scale.
These are the steps to draw a perpendicular on a line at given point.
On simplifying, we get