Which of the following are true? A confidence interval estimate provides an idea of the likely...

Which of the following are true?

		A confidence interval estimate provides an idea of the likely size of the sampling error.
		A disadvantage of a point estimate (compared to interval estimates) is that increased precision achieved through an increased sample size is not reflected in such estimates.
		Given n and the population standard deviation, an increase in the confidence level for an interval estimate will make the interval narrower.
		To obtain a confidence interval estimate for the population mean when using the standard normal variable (Z) and knowing the population standard deviation, the sample size must be at least 30 or more.

Solutions

Expert Solution

THE FOLLOWING STATEMENTS LISTED BELOW ARE TRUE

-Given n and the population standard deviation, an increase in the confidence level for an interval estimate will make the interval narrower.

-A disadvantage of a point estimate (compared to interval estimates) is that increased precision achieved through an increased sample size is not reflected in such estimates.

-A confidence interval estimate provides an idea of the likely size of the sampling error.

THE STATEMENT BELOW ARE FALSE

To obtain a confidence interval estimate for the population mean when using the standard normal variable (Z) and knowing the population standard deviation, the sample size must be at least 30 or more.

this statement is false because the sample size must be at least 15 not 30.

There is no explanation for true statement as they are defination and explanation among themselves.

please give a thumbs up:)

Rahul Sunny answered 1 year ago

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