Question

Of 57 bank customers depositing a check, 25 received some cash back. (a) Construct a 90...

Of 57 bank customers depositing a check, 25 received some cash back.

(a) Construct a 90 percent confidence interval for the proportion of all depositors who ask for cash back. (Round your answers to 4 decimal places.)

The 90% confidence interval is from blank to blank.

Math   Statistics-And-Probability   
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Answer #1

Given that, of 57 bank customers depositing a check, 25 received some cash back. That is, n = 57 and x = 25

a) Using TI-84 calculator we get, the 90 percent confidence interval for the proportion of all depositors who ask for cash back is from 0.3305 to 0.5467

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