Sofia owns a small business selling ice-cream. She knows that in the last week 56 customers paid cash, 6 customers used a debit card, and 18 customers used a credit card. Based on these results, express the probability that the next customer will pay with a credit card as a fraction in simplest form.

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?