A student is experimenting with lightning rods and places one
into the ground. She finds that
the approximate length of rod

above ground is 5/7 of a yard
and the approximate length
1

below ground is 1/3 of a yard.
How many times farther above
the ground is the lightning rod
than below the ground?

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?