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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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flemingpk flemingpk
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A month ago
A department store claims that its average customer satisfaction rating is 28.5. We believe that this rating is too high, so we randomly sample 40 customers and find a sample average of 25.2. If the standard deviation of customer satisfaction for this store is 13.1, what is the probability of observing a sample at least this far below the claimed mean, assuming the claim is true?


▸

0.9441



▸

0.4013



▸

0.0559



▸

0.2500

Textbook 
Introductory Statistics: A Problem-Solving Approach

Introductory Statistics: A Problem-Solving Approach


Edition: 3rd
Author:
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shindh02shindh02
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A month ago
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flemingpk Author
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A month ago
Thanks
Helpmeplease11
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Yesterday
Just got PERFECT on my quiz
mkyoungs
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2 hours ago
Helped a lot
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