SOLUTION: A random sample of 70 printers discovered that 25 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small b

Question 1086254: A random sample of 70 printers discovered that 25 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small businesses.

a. 0.150 < p < 0.564

b. 0.245 < p < 0.469

c. 0.263 < p < 0.452

d. 0.320 < p < 0.395

Answer by Edwin McCravy(20055) (Show Source): You can put this solution on YOUR website!

On your TI graphing calculator.

Press STAT
Press the right arrow key twice to HIGHLIGHT TESTS

Scroll down to    1-PropZInt...

Press ENTER

Make the next screen read:

                        1-PropZInt
                    x:25
                    n:70
                    C-Level:0.95
                    Calculate

Then use the down arrow to highlight Calculate
and press ENTER.

You will see

                       1-PropZInt
                     (.2449,.46939)
                     p-hat =.3571428571
                     n=70

Go by what's on the second line, which is interval notation
form for

           0.2449 < p < .46939

Round those to three decimal places.

Edwin

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