Mathematics, 26.03.2020 03:26, juhavyen
How quickly do synthetic fabrics such as polyester decay in landfills? A researcher buried polyester strips in thes oil for different lengths of time, then dug up the strips and measured the force required to break them. Breaking strength is easy to measure and is a good indicator of decay. Lower strength means the fabric is decayed. In part of the study researchers buried 10 strips of polyester fabric in well-drained soil in the summer. Five of the strips, chosen at random, were dug up after 2 weeks; the other 5 were dug up after 16 weeks. . Here are the data (in pounds of breaking strength): Sample 1 (2 weeks) 118 126 126 120 129 Sample 2 (16 weeks) 124 98 110 140 110 These data can be downloaded: Minitab data Excel or text data Find a 95% confidence interval for the difference in the mean breaking strengths, specifically the mean 2-week breaking strength minus the mean 16-week breaking strength.
Answers: 3
Mathematics, 21.06.2019 19:00, jackieanguiano3700
Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18
Answers: 1
Mathematics, 21.06.2019 19:20, docholiday
Math each whole number with a rational, exponential expression
Answers: 1
How quickly do synthetic fabrics such as polyester decay in landfills? A researcher buried polyester...
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