# franchise thinks that its cost is below that figure. Arandom sample of 28 patients across the country had anaverage cost of \$5250 with a standard deviation of \$629At a 0.025, can it be concluded that the mean is lessthan \$5400?9. Heights of Tall Buildings A researcher estimates thatthe average height of the buildings of 30 or more storiesin a large city is at least 700 feet. A random sample of10 buildings is selected, and the heights in feet are shown.At a 0.025, is there enough evidence to reject the claim?485511841725615520535635616582Source: Pittsburgh Tribune-Review.10. Number of Words ina Novel The National NovelWriting Association states that the average novel is atleast 50,000 words. A particularly ambitious writing

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I need help with question 9 as an example because I am missing the notes. Thank you.

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Given data

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Formulation of Hypothesi...

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