An experiment consists of drawing different colored t-shirts from a drawer that contains an unknown number of t-shirts of different colors. in 55 trials of the experiment, a black t-shirt was drawn 10 times. if the experiment were repeated 110 times, how many times would you predict that a black t-shirt would be drawn?

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?