You want to estimate the percentage of adults who believe that passwords should be replaced with biometric security (such as fingerprints). How many randomly selected adults must you survey? Assume that you want to be 90% confident that the sample percentage is within 3.9 percentage points of the true population percentage. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage of adults who believe that passwords should be replaced with biometric security. The sample size needed is. (Round up to the nearest whole number as needed.) b. Assume that a prior survey suggests that about 47% of adults believe that biometric security should replace passwords. The sample size needed is. (Round up to the nearest whole number as needed.) c. Does the additional survey information from part (b) have much of an effect on the sample size that is required? The additional survey information from part (b) causes the required sample size to change by 10%. Based on this, the additional survey information causes in the sample size that is required.

You want to estimate the percentage of adults who believe that passwords should be replaced with biometric security (such as fingerprints). How many randomly selected adults must you survey? Assume that you want to be 90% confident that the sample percentage is within 3.9 percentage points of the true population percentage. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage of adults who believe that passwords should be replaced with biometric security. The sample size needed is. (Round up to the nearest whole number as needed.) b. Assume that a prior survey suggests that about 47% of adults believe that biometric security should replace passwords. The sample size needed is. (Round up to the nearest whole number as needed.) c. Does the additional survey information from part (b) have much of an effect on the sample size that is required? The additional survey information from part (b) causes the required sample size to change by 10%. Based on this, the additional survey information causes in the sample size that is required.

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Description: You want to estimate the percentage of adults who believe that passwords should be replaced with biometric security (such as fingerprints). How many randomlyselected adults must you survey? Assume that you want to be 90% confident that the sample pe

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

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.

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Question

You want to estimate the percentage of adults who believe that passwords should be replaced with biometric security (such as fingerprints). How many randomly
selected adults must you survey? Assume that you want to be 90% confident that the sample percentage is within 3.9 percentage points of the true population
percentage. Complete parts (a) through (c) below.
a. Assume that nothing is known about the percentage of adults who believe that passwords should be replaced with biometric security.
The sample size needed is.
(Round up to the nearest whole number as needed.)
b. Assume that a prior survey suggests that about 47% of adults believe that biometric security should replace passwords.
The sample size needed is.
(Round up to the nearest whole number as needed.)
c. Does the additional survey information from part (b) have much of an effect on the sample size that is required?
The additional survey information from part (b) causes the required sample size to change by
10%. Based on this, the additional survey information causes
in the sample size that is required.

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