Let X equal the weight in grams of a 52-gram snack pack of candies. Assume that the distribution of X is N(, 4). A random sample of n = 10 observations of X yielded the following data: 55.95 56.54 57.58 55.13 57.48 56.06 59.93 58.30 52.57 58.46 (a) Give a point estimate for . (b) Find the endpoints for a 95% confidence interval for . (c) On the basis of these very limited data, what is the probability that an individual snack pack selected at random is filled with less than 52 grams of candy?

Thursday, January 5 th Kim Gilbert Kimgilb@uga.edu TA Office Hours, Boyd Room 204 • Monday 11:15 am – 5:30 pm • Friday 11:15 am – 3:30 pm Case Study: Helper vs. Hinderer • If infants have no preference, then the outcome can be mimicked by flipping a fair coin • Each coin represents one child; need to toss coin 16 times o Would expect 8 but doesn't need to be exactly 8 o Tail: helper; head: hinderer o How close to 8 does it