Why Doesn't Interferon Prevent All Cells from Being Infected with Viruses

question 60

Multiple Choice

Why doesn't interferon prevent all cells from being infected with viruses?

• A)because interferon is effective against bacterial infections only
• B)because interferon is only released from cells that are already infected
• C)because interferon has no memory capability
• D)because interferon is produced by macrophages,which arrive after an infection has occurred
• E)Both because interferon is only released from cells that are already infected and because interferon has no memory capability are correct.

Understand and apply the plus four method for estimating proportion and standard errors.

Determine the P-value for hypothesis tests concerning proportions.

Understand how sample size affects confidence intervals.

Conduct hypothesis tests concerning differences in proportions and interpret the results.

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Definitions:

Dependent Variable

The variable in an experiment that is expected to change in response to manipulations of the independent variable.

Status Variables

Variables that categorize individuals based on conditions or characteristics at a specific time.

Type I Errors

Incorrectly rejecting a true null hypothesis, also known as a "false positive" finding in research.

Type II Errors

An error that occurs in statistical hypothesis testing when a false null hypothesis is not rejected, misinterpreting the absence of an effect or difference when one actually exists.