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How to find the probability of a hypothesis test? A city newpaper stated that the average time required to sell a used car advertised in the paper is less than 5 days. Assuming the population standard deviation is 2.1 days, if the 'true' population mean is 4.1 days and a sample size of n=49 is used with an alpha equal to 0.05, what is the probability that the hypothesis test will lead to a Type II error?
🏆 H0: mu = 5 days
H1: mu < 5 days
z = (x - mu)/(sigma/sqrt(n))
The z-score that contains 5% in the left tail is -1.644853626 (using the invNorm function on my TI-83).
-1.644853626 = (x - 5)/(2.1/sqrt(49))
x = -1.644853626 * (2.1/7) + 5 = 4.506543912 <-----this is the critical x-value
Now find the area to the right of this x-value under the true mean, ... ➕ read more
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Can someone give me a thesis statement about Hitler? it has to be about which aspects of culture that he had a negative affect on. I wanted to focus on him eliminating gypsies. just please suggest a thesis for me. it is 1 sentence.
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