Suppose it is known from experience that the standard deviation of the weight of 10-ounce packages of cookies is 2.5 ounces. To check whether or not the true average is, on a given day, 10 ounces, employees selected a random sample from the packages. For the significance level a = 0.05, when the average is 12.5 ounces, the power of the test is 0.90. What is the sample size for this study?

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Q: If j(x) = ax² - 5 and j(2) = 19, what is the value of a? %3D %3D (A) -3 (B) 2 (C) 3 (D) 6

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Q: Find a3r 34 and a5- az = 3, a2 = 5, a, = (, - 1 + an - 2) %D %3D |

A: Given : a1 = 3a2 = 5an = 12an-1+an-2