Try to find a good pyramid formula.
Answer:
A statistic is said to be unbiased if the mean of its sampling distribution is equal to the true value of the parameter being estimated.
Step-by-step explanation:
A parameter is a number that describes the population.
A statistic is a number that describes a sample.
A statistic used to estimate a parameter is unbiased if the mean of its sampling distribution is exactly equal to the true value of the parameter being estimated. For example, the mean of a sample is an unbiased estimate of the mean of the population from which the sample was drawn.
A statistic is biased if its expected value is not equal to the parameter.
The x intercepts were supposed to be x = 3, 7
Answer:
B: 20 minutes
Step-by-step explanation:
Because it comes every 30 minutes and he is 10 minutes late we do
30-10=20
Therefore he has to wait 20 minutes for the next train.
