O b. 11880 O c. 479,001,600 O d. 48 QUESTION 4 10 points Save Answer At Apple Corporation we are studying the latest version of the iPhone and the usefulness of the latest operating system. In past studies, we have found the standard deviation to be 80. Find the sample size necessary we need to survey to be 95% confident of the result. The margin of error allowed is 20. What is the required sample size ? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). ! ! IC up Paragraph Arial 10pt V V L 1III D . . . HE E X2 X2 V x [+ O WORDS POWERED BY TINY