The following data values represent a sample. What is the variance of the sample? X = 7. Use the information in the table to help you.
х
9
5
3
7
11
(x; - x)2
4
4
16
0
16
A. 5.2
B. 8
C. 10
D. 4.5

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?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?