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That was quick, ty.

 

My problem question is:

 

Of 54 bank customers depositing a check, 17 received some cash back.

 

(a) Construct a 90% conf. int. for the proportion of all depositors who ask or cash back.

 

I am unfamiliar with the scientific cal. and I am having a problem trying to figure out how to put in the formula.

 

Thank you

 Oct 26, 2019
 #1
avatar+120 
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whats your calculator model?

 Oct 26, 2019
 #2
avatar+236 
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Yes, what HoldMyBeer said. I can most likely solve the problem if I knew what a 90% conf. int. was tho... My own stupidity I suppose

 Oct 26, 2019
 #3
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means confidence interval 

HoldMyBeer  Oct 26, 2019
 #6
avatar+105668 
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There is not much info there.

What formula do you want to use?

 Oct 27, 2019

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