Question

A study by a reputable research group captured multitasking activities of adults who use different devices while watching TV. The study reported that 315 of 432 ​(73​%) smartphone users​ sampled, 192 of 342 ​(56​%) computer users​ sampled, and 142 of 266 ​(53​%) tablet users sampled used their device to check social media unrelated to the video content while watching TV. Complete parts​ (a) through​ (c) below. a. Is there evidence of a significant difference among the​ smartphone, computer, and tablet users with respect to the proportion who use their device to check social media unrelated to the video content while watching​ TV? (Use alpha equals 0.05​.) State the null and alternative hypotheses. A. Upper H 0 : pi 1 equals pi 2 equals pi 3 equals 0 Upper H 1 : pi 1 not equals pi 2 not equals pi 3 not equals 0 B. Upper H 0 : pi 1 equals pi 2 equals pi 3 Upper H 1 : Not all pi Subscript j Baseline are equal ​(where jequals​1, ​2, 3) C. Upper H 0 : pi 1 equals pi 2 equals pi 3 Upper H 1 : pi 1 not equals pi 2 not equals pi 3 D. Upper H 0 : pi 1 equals pi 2 equals pi 3 equals 0 Upper H 1 : At least one of the pi Subscript j Baseline is not equal to zero​ (where jequals​1, ​2, 3)

Answer 1