A simple random sample of 30 items resulted in a sample mean of 10. The population standard deviation is o = 5. Round your answers to two decimal places.
a. What is the standard error of the mean, oi?
11
b. At 95% confidence, what is the margin of error?

the answer is (-4,-4)

hope this ! : d

a

step-by-step explanation:

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hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

the first option i believe

step-by-step explanation: