Research indicates that the standard deviation of typical body temperature is 0.4 degree Celsius (\(C\)). Which of the following represents the standard deviation of typical human body temperature in degrees Fahrenheit (\(F\)), where \(F=\dfrac{9}{5}C+32 \) ?

The standard deviation will be multiplied by the same factor that the values are multiplied by. In this case, all temperature values are multipled by \(\dfrac{9}{5}\). Addition of 32 to all values does not change the spread of the data.