An SRS of size 100 is taken from Population A with proportion 0.8 of successes. An independent SRS of size 400 is taken from Population B with proportion 0.5 of successes. The sampling distribution for the difference (Population A Population B) in sample proportions has what mean and standard deviation? (a) mean = 0.3; standard deviation = 1.3 (b) mean = 0.3; standard deviation = 0.40 (c) mean = 0.3; standard deviation = 0.047 (d) mean = 0.3; standard deviation = 0.0022 (e) mean = 0.3; standard deviation = 0.0002

STAT 200 Chapter 1 Statistics: the word often used to describe trivial data; numbers generated from a sample of data; a field of study within mathematics. o A collection of procedures and principles for gathering data and analyzing information to help people make decisions when faced with uncertainty. Branches of statistics: o Descriptive statistics: the branch of statistics that involves the organization, summarization, and display of data o Probability: a basic tool in the study of inferential statistics and is the mathematical backbone of inferential statistics o Inferential Statistics: the branch of stat