For a sample of size 5, if x1 - x̄ = -5, x2 - x̄ = 9, x3 - x̄ = -7, and x4 - x̄ = -2, then the sample standard deviation is: Choose one answer. a. 5.639 b. 6.782 c. None of the other answers are correct d. 6.305 e. 6.066 Please note that x̄ is x-bar (mean of sample). This question has been puzzling me. At first I thought there was an error because only 4 numbers are listed but it says there sample size is 5. But, this is a valid question. So, I'm going to need the x5- x̄ value in order to calculate the standard deviation. This is where I'm lost.... could someone please provide some assistance? Thank you so much for your time.