Flashcards
Stats 151 - Estimation Population Mean from the Sample Mean
Cards in this deck (6)
- 1what is P^?values used to predict the structure of a graph that all lie on the bell curve distribution. they are known from the sample
- 2P^ values are used as estimate of u? How are some good and some bad?only estimates that are near the center count as good.
- 3what is 1-alpha?the confidence interval for u
- 4to find the probability that a value will be near u you need to find m. how do you do this?P(u-m < x bar < u+m) = 1-alpha. subtract u from both sidesand divide each portion by sigma over square root of n. P(-m/sigma/square root of n < Z < m/sigma/square root of n)= 1- alpha. this is equal to - M = Za/2(sigma/ square root of n). this is only used when the sample is greater then 30
- 5how do we find the probability for the values if the sample is less then 30?X bar + or – ta/2 (sigma/ square root of n)
- 6how do you find the probability for graph with a confidence level of 95%calculate the outter sections by finding alpha over 2 which gives you 0.005. add this to 0.99 to find the area of the main section. which is 0.995. use this value to find the z score and then plug in for Za/2
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- Chemistry 101 Stats 151 Flashcards on Stats 151 - Estimation Population Mean from the Sample Mean, created by jennabarnes12387 on 24/02/2014.
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- jennabarnes12387 · Feb 2014
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- Feb 19, 2016
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