Question: I need help solving the Standard deviation only. I have figured out the Mean. Thank you Find the mean and standard deviation for each uniform

I need help solving the Standard deviation only. I have figured out the Mean. Thank you

Find the mean and standard deviation for each uniform continuous model.(Round "Mean" answers to 1 decimal place and "Standard deviation" answers to 4 decimal places.)

u(3,12)

u (100, 190)

u(4, 92)

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