Here are some numbers that you can use to sharpen your computational skills for sample size determination. Crest Toothpaste is reviewing plans for its annual survey of toothpaste purchasers. With each case that follows, calculate the sample size pertaining to the key variable under consideration. Where information is missing, provide reasonable assumptions.

Using a cps-sample of 7,440 individuals, you estimate the following regression: = 20.91 - 2.61 x female where female is a binary variable that takes on the value of 1 for females and is 0 otherwise. the standard error on the coefficient on female is 0.25. the 95% confidence interval for the gender wage gap, or the amount that females earn less, is: a) [-3.10, -2.12] b) [18.30, 23.52] c) [-3.02, -2.20] d) [-1.96, -1.64]

bradford, inc., expects to sell 9,000 ceramic vases for $21 each. direct materials costs are $3, direct manufacturing labor is $12, and manufacturing overhead is $3 per vase. the following inventory levels apply to 2019: beginning inventory ending inventory direct materials 3,000 units 3,000 units work-in-process inventory 0 units 0 units finished goods inventory 300 units 500 units what are the 2019 budgeted production costs for direct materials, direct manufacturing labor, and manufacturing overhead, respectively?

The state in which the manufacturing company you work for is located regulates the presence of a particular substance in the environment to concentrations ≤ x. recently-released, reliable research endorsed by the responsible federal agency conclusively demonstrates that the substance poses no risks at concentrations up to 5x. your company has asked you to consider designing a new process with a waste discharge stream containing up to 2x of the substance. based on the stated conditions, describe this possible.