A simple random sample of size n is drawn from a population that is known to be normally distributed. The sample​ variance, s squareds2​, is determined to be 11.611.6. Complete parts​ (a) through​ (c). ​(a) Construct a​ 90% confidence interval for sigma squaredσ2 if the sample​ size, n, is 20. The lower bound is 7.317.31. ​(Round to two decimal places as​ needed.) The upper bound is 21.7921.79. ​(Round to two decimal places as​ needed.) ​(b) Construct a​ 90% confidence interval for sigma squaredσ2 if the sample​ size, n, is 30. The lower bound is 7.907.90. ​(Round to two decimal places as​ needed.) The upper bound is 1919. ​(Round to two decimal places as​ needed.) How does increasing the sample size affect the width of the​ interval? The width does not change The width increases The width decreases

Vulcan flyovers offers scenic overflights of mount st. helens, the volcano in washington state that explosively erupted in 1982. data concerning the company’s operations in july appear below: vulcan flyovers operating data for the month ended july 31 actual results flexible budget planning budget flights (q) 56 56 54 revenue ($350.00q) $ 16,500 $ 19,600 $ 18,900 expenses: wages and salaries ($3,300 + $91.00q) 8,354 8,396 8,214 fuel ($31.00q) 1,904 1,736 1,674 airport fees ($870 + $35.00q) 2,730 2,830 2,760 aircraft depreciation ($11.00q) 616 616 594 office expenses ($240 + $1.00q) 464 296 294 total expense 14,068 13,874 13,536 net operating income $ 2,432 $ 5,726 $ 5,364 the company measures its activity in terms of flights. customers can buy individual tickets for overflights or hire an entire plane for an overflight at a discount. required: 1. prepare a flexible budget performance report for july that includes revenue and spending variances and activity variances.

Specialization—the division of labor—enhances productivity and efficiency by a) allowing workers to take advantage of existing differences in their abilities and skills. b) avoiding the time loss involved in shifting from one production task to another. c) allowing workers to develop skills by working on one, or a limited number, of tasks. d)all of the means identified in the other answers.

When the federal reserve buys bonds from or sells bonds to member banks, it is called monetary policy reserve ratio interest rate adjustment open market operations