The average score on a special test of knowledge of wood refinishing has 12 points a mean of 58 and a standard deviation of 7. If the distribution is normal,
find the values in which at least 68% of the data will lie.
Your answer

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

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?