Here is a distribution of six observations, sorted in ascending order:
4.7.9.2, 10.9, 12.3, 16.6, 18.3
the mean of this distribution is 12. what is the value of è (x; - 7)?

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?