Smith Is a Weld Inspector at a Shipyard

question 43

Multiple Choice

Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that forthe afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completedthat shift, what is the probability that he will find between 10 and 20 substandard welds?

• A) 0.8132
• B) 0.4066
• C) 0.2033
• D) 0.6377

Understand the mechanisms of data breaches and their impacts.

Identify common techniques used by hackers to access and exploit computer systems.

Understand how to protect personal and sensitive information on public networks.

Recognize the techniques used in identity theft and its prevention.

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Definitions:

Probability

A measure quantifying the likelihood that certain events will occur.

Null Hypothesis

Re-phrased: The presumption in statistical testing that asserts no association or effect among studied variables.

Critical Value

A threshold in hypothesis testing that defines the boundary beyond which an observed test statistic is considered statistically significant.

Level of Significance

A threshold used in hypothesis testing that determines the probability of wrongly rejecting a true null hypothesis.