Question

A colleague has calculated a 90% confidence interval about the sample mean as: 105

1) The probability is 0.90 that the population mean is located between 105 and 125.

2) The probability is 0.10 that the sample mean is larger than 125 or smaller than 105.

3) The probability is 0.90 that the sample mean is located between 125 and 125.

4) Without an estimate of variability, there is not enough information available to make an interpretation.

Answer 1

A colleague has calculated a 90% confidence interval, but without an estimate of variability, there is not enough information to make an interpretation.

Step-by-step explanation:

A colleague has calculated a 90% confidence interval about the sample mean as: 1051) The probability is 0.90 that the population mean is located between 105 and 125. 2) The probability is 0.10 that the sample mean is larger than 125 or smaller than 105. 3) The probability is 0.90 that the sample mean is located between 125 and 125. 4) Without an estimate of variability, there is not enough information available to make an interpretation.