The diameters (in inches) of 17 randomly selected bolts produced by a machine are listed. Use a 95% level of confidence to construct a confidence interval for (a) the population variance o and (b) the population standard deviation o. Interpret the results. 4.469 4.436 4.008 4.315 4.002 3.763 3.828 3.777 4.234 3.963 4.136 4.562 3.951 3.739 3.877 3.833 4.482 (Round to three decimal places as needed.) O A. With 5% confidence, it can be said that the population variance is less than B. With 95% confidence, it can be said that the population variance is between 0.044 and 0.184. O C. With 95% confidence, it can be said that the population variance is greater O D. With 5% confidence, it can be said that the population variance is between than and (b) The confidence interval for the population standard deviation is (0.210,0.429 ). (Round to three decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to three decimal place as needed.) O A. With 5% confidence, you can say that the population standard deviation is B. With 95% confidence, you can say that the population standard deviation is less than 7 inches. greater than inches. O C. With 5% confidence, you can say that the population standard deviation is O D. With 95% confidence, you can say that the population standard deviation between and inches. is between and inches.

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.