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Problem 12 in Chapter 9 described a study that examined the spotlight effect, which refers to people over-estimating the extent to which others notice theirappearance or behavior. In the study, n=9 participants were asked to put on a Barry Manilow T-shirt and walk into a room where other students were working. Later,the participants were asked to estimate for the nine participants was M= 6.4 with SS=162.
a)Make a point estimate of the number of people that participants think noticed the shirts.
b)Compute the 90% confidence interval for the mean number of people.
c)After interviewing the students in the room, the researchers found that an average of μ=3.1 students actually noticed the shirt. BAsed on this value and youransers from a and b, how much do people overestimate the number of others who notice their appearance.
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