A Study Compared Flu Vaccine Administered by Injection and Flu

question 16

Multiple Choice

A study compared flu vaccine administered by injection and flu vaccine administered as a nasal spray. Each of 4,000 children under the age of 5 who participated in the study received both a nasal spray and an injection, but only one was the real vaccine and the other was salt water. At the end of the flu season, it was determined that of the 2,000 children receiving the real vaccine by nasal spray, 10.1% got the flu. Of the 2,000 children receiving the real vaccine by injection, 15.6% got the flu. The 95% confidence interval for the difference in treatment proportions is: ​

• A) 0.00±0/021
• B) 0.055±0.017
• C) 0.055±0.024
• D) 0.055±0.021
• E) 0.00±0.023

Simplify expressions involving complex numbers to their standard form.

Identify and apply the concepts of additive inverse and multiplicative inverse in the context of complex numbers.

Evaluate expressions involving complex conjugates of complex numbers.

Solve equations involving complex numbers and verify solutions.

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