When n is large, the statistic s is approximately unbiased for estimating s and has approximately a normal distribution The standard deviation of this statistic when the population distribution is normal is which can be estimated by 9 9 to obtain a 95 confidence interval for the true standard deviation of waiting time for angiography V2n s (z critical value)

Question: When n is large, the statistic s is approximately unbiased for estimating s and has approximately a normal distribution. The standard deviation of this statistic

When n is large, the statistic s is approximately unbiased for estimating s and has approximately a normal The standard deviation of this statistic when the
population is normal is

which can be estimated by

9.9 to obtain a 95% confidence interval for the true standard deviation of waiting time for angiography.

V2n s (z critical value)

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