Author:
Christine Farr

Question 1 (2.85 points)Eggs that are contaminated with salmonella can cause food poisoning among consumers. A large egg producer takesan SRS of 200 eggs from all the eggs shipped in one day. The laboratory reports that 11 of these eggs had salmonellacontamination. Unknown to the producer, 0.2% (two-tenths of one percent) of all eggs shipped had salmonella. In thissituation,Question 1 options:a) both 0.2% and 11 are statistics.b) 11 is a parameter and 0.2% is a statistic.c) 0.2% is a parameter and 11 is a statistic.d) both 0.2 % and 11 are parameters.SaveQuestion 2 (2.85 points)Suppose you interview 10 randomly selected workers and ask how many miles they commute to work. You'll computethe sample mean commute distance. Now imagine repeating the survey many, many times, each time recording adifferent sample mean commute distance. In the long run, a histogram of these sample means representsQuestion 2 options:a) a simple random sample.b)the true population average commutedistance.c) the sampling distribution of the sample mean.d) the bias, if any, that is present in the sampling method.SaveQuestion 3 (2.85 points)The distribution of actual weights of 8 oz wedges of cheddar cheese produced at a dairy is Normal with mean 8.1ounces and standard deviation 0.2 ounces.Reference: Ref 11-5The probability that the average amount charged over these 160 procedures is more than $1180 isQuestion 3 options:a) 0.448.b) 0.552.c) 0.046.d) 0.954.SaveQuestion 4 (2.85 points)In a large population of college-educated adults, the mean IQ is 112 with standard deviation 25. Suppose 300 adultsfrom this population are randomly selected for a market research campaign.Reference: Ref 11-4

Tutorial