Kyd and North are playing a game. Kyd selects one card from a standard 52 card deck. If Kyd selects a face card (Jack, Queen, King) North pays him $6. If Kyd selects any other type of card he pays North $3. a) What is Kyd's expected value for this game? b) What is North's expected value for this game? Please provide thorough steps.

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?