franchise thinks that its cost is below that figure. A random sample of 28 patients across the country had an average cost of $5250 with a standard deviation of $629 At a 0.025, can it be concluded that the mean is less than $5400? 9. Heights of Tall Buildings A researcher estimates that the average height of the buildings of 30 or more stories in a large city is at least 700 feet. A random sample of 10 buildings is selected, and the heights in feet are shown. At a 0.025, is there enough evidence to reject the claim? 485 511 841 725 615 520 535 635 616 582 Source: Pittsburgh Tribune-Review. 10. Number of Words ina Novel The National Novel Writing Association states that the average novel is at least 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.

franchise thinks that its cost is below that figure. A
random sample of 28 patients across the country had an
average cost of $5250 with a standard deviation of $629
At a 0.025, can it be concluded that the mean is less
than $5400?
9. Heights of Tall Buildings A researcher estimates that
the average height of the buildings of 30 or more stories
in a large city is at least 700 feet. A random sample of
10 buildings is selected, and the heights in feet are shown.
At a 0.025, is there enough evidence to reject the claim?
485
511
841
725
615
520
535
635
616
582
Source: Pittsburgh Tribune-Review.
10. Number of Words ina Novel The National Novel
Writing Association states that the average novel is at
least 50,000 words. A particularly ambitious writing
Transcribed Image Text:franchise thinks that its cost is below that figure. A random sample of 28 patients across the country had an average cost of $5250 with a standard deviation of $629 At a 0.025, can it be concluded that the mean is less than $5400? 9. Heights of Tall Buildings A researcher estimates that the average height of the buildings of 30 or more stories in a large city is at least 700 feet. A random sample of 10 buildings is selected, and the heights in feet are shown. At a 0.025, is there enough evidence to reject the claim? 485 511 841 725 615 520 535 635 616 582 Source: Pittsburgh Tribune-Review. 10. Number of Words ina Novel The National Novel Writing Association states that the average novel is at least 50,000 words. A particularly ambitious writing
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