Mathematics, 16.07.2019 23:30 miller5452
From a sample of 225 people in pennsylvania, the mean age is 41 years. from a sample of 300 people in new jersey, the mean age is 45 years. assume the population standard deviations for the ages of people from pennsylvania and new jersey are 6 years and 8 years, respectively. construct a 90% confidence interval for the difference in average age between pennsylvania residents and new jersey residents. enter your answer in the format (lower , upper) where "lower" is the lower confidence limit and "upper" is the upper confidence limit. let the pennsylvania ages be the first sample and let the new jersey ages be the second sample. round your answers to two decimal places. do not include units in your answer.
Answers: 3
Mathematics, 21.06.2019 22:00
You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?
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Mathematics, 21.06.2019 23:00
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Mathematics, 22.06.2019 01:30
What is the solution for the following system of equations? use any method to solve. 2x + 8y = 4 x = -3y + 5 question 4 options: x = 14, y= -3 x = 2, y = -3 x = -3, y = -3 x = 12, y = 5
Answers: 1
From a sample of 225 people in pennsylvania, the mean age is 41 years. from a sample of 300 people i...
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