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What is H0 (sign test)
this question is reallly baffling me.
Q. Eight apples are chosen at random from a crate containing a large number of apples. the masses, in grams are:
147, 138, 171, 142, 152, 145, 141, 143
use a sign test at the 5% significance level to test wheather the median mass of the apples is 150 g.
-----------------------------------------------------------------------------------------
what is the null hypothesis? is it that the median is Not equal to 150 and the alternative hypothesis is that the median is equal to 150 or vice versa?
i looked at the back of the book and it says p=0.289 which is >0.05, so no significant evidence that the mean is not 150.
where did they get that value of p from? i know i have to use the binomial distribution whith paramtres (8, 0.5) but what value of x?
safe
Q. Eight apples are chosen at random from a crate containing a large number of apples. the masses, in grams are:
147, 138, 171, 142, 152, 145, 141, 143
use a sign test at the 5% significance level to test wheather the median mass of the apples is 150 g.
-----------------------------------------------------------------------------------------
what is the null hypothesis? is it that the median is Not equal to 150 and the alternative hypothesis is that the median is equal to 150 or vice versa?
i looked at the back of the book and it says p=0.289 which is >0.05, so no significant evidence that the mean is not 150.
where did they get that value of p from? i know i have to use the binomial distribution whith paramtres (8, 0.5) but what value of x?
safe
this is a non parametric test it does not consider the mean unlike parametric tests such as z test and t test, so yh its testing the median not the mean
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