Express x3 + 4x2 – 45x in factored form.
2 answers:
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Answer:
The standard deviation of the sampling distribution of the sample wait times is of 0.8 minutes.
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem establishes 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
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30. Otherwise, the mean and the standard deviations holds, but the distribution will not be approximately normal.
Standard deviation 4 minutes.
This means that
A sample of 25 wait times is randomly selected.
This means that
What is the standard deviation of the sampling distribution of the sample wait times?
The standard deviation of the sampling distribution of the sample wait times is of 0.8 minutes.
Answer:
Step-by-step explanation:
Notice that with the provided information they are given you not ust the slope of the line (-2), but also the y-intercept (the point where the line crosses the y-axis which happens when x=0).
So you can directly write the equation of the line in slope-intercept form [ where "m" is the slope and "b" the y-value when x=0].
Such gives us: