PROBLEM 11E

Students took n = 35 samples of water from the east basin of Lake Macatawa (see Example 7.1-4) and measured the amount of sodium in parts per million. For their data, they calculated and s2 = 24.44. Find an approximate 90% confidence interval for μ, the mean of the amount of sodium in parts per million.

Reference see Example 7.1-4

Let X equal the weight in grams of a “52-gram” snack pack of candies. Assume that the distribution of X is N(μ, 4). A random sample of n = 10 observations of X yielded the following data:

(a) Give a point estimate for μ.

(b) Find the endpoints for a 95% confidence interval for μ.

(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?

Data Analysis and Politics “For today’s August 31, 2016 First Class graduate, one word: STATISTICS”-NYT A New Paradigm Today we learned about the importance of the course (cause obviously it wouldn’t be required if it weren’t important)! Some key points: 1. Using...