Do male and female servers at Swank Bar work the same number of hours? A sample of 75 female servers worked an average of 39 hours per week, with a standard deviation of 3. A sample of 75 male servers worked an average of 26 hours per week, with a standard deviation of 2. Let 41 and u2 represent the typical number of hours worked by all female and male servers at Swank Bar, respectively. Estimate with a 89% confidence level how many more hours female servers work. Round answers to the nearest hundredth. < l1 - 42 Which of the following does your data suggest? O Female servers work more hours Female and male servers work about the same number of hours O Male servers work more hours

Do male and female servers at Swank Bar work the same number of hours? A sample of 75 female servers worked an average of 39 hours per week, with a standard deviation of 3. A sample of 75 male servers worked an average of 26 hours per week, with a standard deviation of 2. Let 41 and u2 represent the typical number of hours worked by all female and male servers at Swank Bar, respectively. Estimate with a 89% confidence level how many more hours female servers work. Round answers to the nearest hundredth. < l1 - 42 Which of the following does your data suggest? O Female servers work more hours Female and male servers work about the same number of hours O Male servers work more hours

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean of 260 mg and a standard deviation of 48 mg. In a random sample of 600 adults, how many consume at least 320 mg of caffeine daily?
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A researcher claims that the stomachs of blue crabs from Location A contain more fish than the stomachs of blue crabs from Location B. The stomach contents of a sample of 13 blue crabs from Location A contain a mean of 191 milligrams of fish and a standard deviation of 38 milligrams. The stomach contents of a sample of 8 blue crabs from Location B contain a mean of 189 milligrams of fish and a standard deviation of 44 milligrams. At a = 0.10, can you support the researcher's claim? Assume the population variances are equal. Complete parts (a) through (d) below. t= 0.110 (Round to three decimal places as needed.) (c) Calculate the P-value. P=|| (Round to four decimal places as needed.)
Suppose that on a certain section of I-95, with a posted speed limit of 65 miles per hour, the speeds of all vehicles have a bell-shaped distribution with a mean of 72 mph and a standard deviation of 3 mph. Find the percentage of vehicles with the following speeds on this section of I-95: greater than 75 mph. Use the Empirical Rule. Suppose that on a certain section of I-95, with a posted speed limit of 65 miles per hour, the speeds of all vehicles have a bell-shaped distribution with a mean of 72 mph and a standard deviation of 3 mph. Find the percentage of vehicles with the following speeds on this section of I-95: greater than 75 mph. Use the Empirical Rule. 81.5% 16% 32% 34% 50%