Please show work with formulas used. Thank you.

C. n d. None of the above. 5 3. A researcher uses a sample of 20 college sophomores to determine whether they have any preference between two smartphones. Each student uses each phone for one day and then selects a favorite. If 14 students select the first phone and only 6 choose the second, then what is the value for X? a. 0.80 b. 1.60 c. 3.20 d. 11.0 1 2. b 3. c