Biology 2244A/B Lecture Notes - Lecture 7: Confounding, Confidence Interval, Sampling Distribution
28 Feb 2017
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If population is normal then the sample distribution should be normal c) 150 lbs. You expect to get one of the values that occur frequently and if it"s a normal distribution you expect to to be close to the mean. Single sample don"t expect to get the extreme values (happen barely) Z distribution gives us everything to the left so use z distribution find closest number to 0. 025 to find the z score wise. cgu. edu/portfolio/demo-confidence-interval-creation/ it"s a bad interval if it doesn"t cross the mean. 95% of the intervals you construct will capture the real mean. Assuming sampling dis is normal that way we know 95% of them fall within the mean. Trying to estimate the pop mean mu. X bar is a point estimate single estimate of what mu is: problem: many x bar values. Sd tells us how far a value is from the mean gives us a typical value of the sampling error.
