Question

A study examined whether the content of TV shows influenced the ability of viewers to recall brand names in commercials. The researchers randomly assigned volunteers to watch one of three​ programs, each containing the same ten commercials. The shows were either​ violent, sexual, or neutral.​ Afterwards, the subjects were asked to recall the brands of the advertised products. Results are in the accompanying table. Use the table to complete the info below.

Violent   Sexual   Neutral
No. of subjects   98   104   98
Mean 2.64   3.31   4.06
SD 1.58   2.02   1.65

​a) Is there a significant difference in​ viewers' abilities to remember brands advertised in shows with sexual vs. neutral ​content? (Assume a significance level of 0.05​.)

State the null and alternative hypotheses.

b) Determine the T statistics

c) Find the P value

d) state your conclusion

e) Find the 95% confidence interval for the diff in the mean # of brand names remembered between the groups watching shows content and those watching the neutral shows.

The 95% confidence interval is (____, _____)

Answer 1