I compute a 99%CI. I am 99% confident that the true value of the population para

Question

I compute a 99%CI. I am 99% confident that the true value of the population parameter is with in this interval. The high ? CI makes me feel good and unlikely to make an error.  What is the disadvantage of a high ? CIs?

If this does not immediately come to you, compute a 90%CI and a 99%CI given x-bar=100, ?=20, and n=30 and compare them.

They require large z-values.

They have a very low probability of making an error.

They have a high probability of making an error.

The distance between the limits can be very wide.

They require large z-values.

They have a very low probability of making an error.

They have a high probability of making an error.

The distance between the limits can be very wide.

Explanation / Answer

as we know that z score is high for high CI ; therefore precision will be less.

The distance between the limits can be very wide.

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