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/sci/ - Science & Math

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2145131 No.2145131 [Reply] [Original]

sup /sci/

can someone explain to me how to figure out confidence intervals?

ex.A sample of 12 observations is selected from a normal population for which the population standard deviation is known to be 4. The sample mean is 17.

or this one

"It is estimated that 60 percent of U.S. households subscribe to cable TV. You would like to verify this statement for your class in mass communications.

If you want your estimate to be within 5 percentage points, with a 95 percent level of confidence, how large of a sample is required? (Round your answer to the next whole number.)"

It should be pretty easy for anybody whos not retarded at math liek me

>> No.2145170

there is only one answer. OUR LORD AND SAVIOR JESUS CHRIST. PRAISE HIM!

>> No.2145197

>>2145170
no try again

>> No.2145270

Please someone help :(

>> No.2145318

somebody help this faggot

>> No.2145404

>>2145318
YES FOR THE LOVE OF GOD THIS!