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January 30th, 2019, 11:04 AM  #1 
Newbie Joined: Jan 2019 From: California Posts: 3 Thanks: 0  Please help with math
1) A researcher is studying a population of bats in which 16% of the population has a certain trait. The researcher wants sampling distribution with a standard deviation that is less than 2%. Which sample sizes could the researcher use? Select all that apply : n=200 n=300 n=400 n=500  2) From a normally distribution population, a simple random sample of size 38 is taken. The mean of the sample is 82 and the standard deviation of the sample is 4. What is the 90% confidence interval for the population mean? Round to the nearest tenth ( [1], 83.1) 
January 30th, 2019, 11:20 AM  #2 
Math Team Joined: May 2013 From: The Astral plane Posts: 2,042 Thanks: 815 Math Focus: Wibbly wobbly timeywimey stuff.  

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