mstutz25 mstutz25

27-05-2024
Mathematics

Answered

A researcher sends out 30 surveys. The probability a person returns the survey is 60%. If X is the number of surveys returned to the researcher, the standard deviation of X will be
A. 7.20
B. 2.68
C. 12

Answer :

austinjin3234 austinjin3234

27-05-2024

Answer:

B

Step-by-step explanation:

[tex]\sqrt{30 * 0.6 * (1-0.6)}[/tex] = 2.68

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