Answer:C)
Step-by-step explanation:
Given : The distribution of the number of moths captured per night by a certain moth trap is approximately normal with .
Also, 28 percent of the captures fall below 76 per night, which of the following equation,
On z-table , the z-value corresponding to the p-value of 28% is -0.58.
Since formula for z-score : , where x is random variable and is standard deviation.
For the current situation, the formula becomes with values as
Hence, the equations can be used to find σσ, the standard deviation of the distribution :-