Find the​ z-scores that separate the middle ​80% of the distribution from the area in the tails of the standard normal distribution.

Aline passes through 3,7 and 6,9 what equation represents the line

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?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1