Question

How to calculate interval estimate without standard deviation

Answer 1

Step-by-step explanation:

How to Find a Sample Size Given a Confidence Interval and Width (unknown population standard deviation)

za/2: Divide the confidence interval by two, and look that area up in the z-table: .95 / 2 = 0.475. ...

E (margin of error): Divide the given width by 2. 6% / 2. ...

: use the given percentage. 41% = 0.41. ...

: subtract from 1.

Answer 2

Answer:

To calculate a CI for the population mean (average), under these conditions, do the following:

Determine the confidence level and find the appropriate z*-value. Refer to the above table.

Find the sample mean. for the sample size (n). ...

Multiply z* times. and divide that by the square root of n. ...

Take.

Step-by-step explanation:

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