1. Leo is a self-employed framer. One month, his framing business had four contracts for $6300.00, $4100.00, $1500.00, and $950.00. The cost of Leo's expenses and material to
complete these contracts was $7850.00.
a. How much profit did Leo earn for the month?

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?