Question

J UULUTUSUIDS_URGJUFIObmltV3... What should I buy? A study conducted by a research group in a recent year reported that 58% of cell phone owners used their phones inside a store for guidance on purchasing decisions. A sample of 15 cell phone owners is studied. Round the answers to four decimal places. Part 1 of 4 (a) What is the probability that seven or more of them used their phones for guidance on purchasing decisions? The probability that seven or more of them used their phones for guidance on purchasing decisions is . Part 2 of 4 (b) What is the probability that fewer than eight of them used their phones for guidance on purchasing decisions? The probability that fewer than eight of them used their phones for guidance on purchasing decisions is Part 3 of 4 (c) What is the probability that exactly nine of them used their phones for guidance on purchasing decisions? The probability that exactly nine of them used their phones for guidance on purchasing decisions is Check Answer Save For Later Submit Assignme Pr Edination All Rights Reserved. Terms of Use

Answer 1

Ans Excel Formula 0.8746 =1-BINOM.DIST(6,15,0.58, TRUE) 0.2630 =BINOM.DIST(7,15,0.58, TRUE) 0.2041 =BINOM.DIST(9,15,0.58, FALSE) 0.0678 =1-BINOM.DIST(11,15,0.58, TRUE) NOT unusual (c) (d)