Question

Mean score is 25/50. What is one standard deviation of the mean?

a) 12.5
b) 6.25
c) 5
d) 2.5

Answer 1

The standard deviation of the mean is 0.1.

Step-by-step explanation:

The mean score of 25/50 represents a proportion of 0.5. The standard deviation of the mean can be calculated using the formula: √(p(1-p)/n), where p is the proportion and n is the sample size. Plugging in the values, we get √(0.5 * 0.5 / 50) = √0.01 = 0.1. Therefore, the standard deviation of the mean is 0.1, which is equivalent to 1/10. Since the answer options are not aligned with this value, none of the provided options is correct.