6.85 Snacking and TV Is television dangerous to your diet? Psychologists believe that excessive eating may be associated with emotional states (being upset or bored) and environmental cues (watching television, reading, and so on). To test this theory, suppose you randomly selected 60 overweight persons and matched them by weight and gender in pairs. For a period of two weeks, one of each pair is required to spend evenings reading novels of interest to him or her. The other member of each pair spends each evening watch- ing television. The calorie count for all snack and drink intake for the evenings is recorded for each person, and you record x = 19, the number of pairs for which the television watchers' calorie intake exceeded the intake of the readers. If there is no difference in the effects of television and reading on calorie intake, the prob- ability p that the calorie intake of one member of a pair exceeds that of the other member is 0.5. Do these data provide sufficient evidence to indicate a difference between the effects of television watching and reading on calorie intake? (HINT: Calculate the z-score for the observed value, x=19.)