Lucas recorded his lunch expenditure each day for one week in the table below.Find the mean, standard deviation, and variance of Lucas’ lunch expenditures. Round to the nearest thousandth. (3 points)
Sun Mon Tues Wed Thurs Fri Sat
Expend. $4.85$5.10$5.50$4.75$4.50$5.00$6.00

Question

Lucas recorded his lunch expenditure each day for one week in the table below.Find the mean, standard deviation, and variance of Lucas’ lunch expenditures. Round to the nearest thousandth. (3 points)
               Sun    Mon  Tues  Wed  Thurs  Fri   Sat 
Expend. $4.85$5.10$5.50$4.75$4.50$5.00$6.00

anonymous · Answer

I know the mean is 5.1, I think the standard deviation is 0.218 but I'm not completely sure.

jim_thompson5910 · Answer

The mean of 5.1 is correct

jim_thompson5910 · Answer

If you're talking about the population variance, then the answer is indeed 0.218

Take the square root of this to get sqrt(0.218) = 0.4669047 and that rounds to 0.467

jim_thompson5910 · Answer

So the population variance is 0.218

The population standard deviation is 0.467

anonymous · Answer

Thank you