A study was conducted by the Department of Zoology at the University of Virginia to measure the increase of levels of a certain microorganism in the Cedar Run river. From twenty two measuring stations along the river, the average density measurements, in organisms per square meter, from the previous year was 5715 with a standard deviation of 321. This year's average density measurement was 6095 with a standard deviation of 305. Assume that the variances are equal. With 95% confidence, test to see if the density has increased by more than 200 organisms per square meter.
A study was conducted by the Department of Zoology at the University of Virginia to measure the increase of levels of a certain microorganism in the Cedar Run river. From twenty two measuring stations along the river, the average density measurements, in organisms per square meter, from the previous year was 5715 with a standard deviation of 321. This year's average density measurement was 6095 with a standard deviation of 305. Assume that the variances are equal. With 95% confidence, test to see if the density has increased by more than 200 organisms per square meter.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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A study was conducted by the Department of Zoology at the University of Virginia to measure the increase of levels of a certain microorganism in the Cedar Run river. From twenty two measuring stations along the river, the average density measurements, in organisms per square meter, from the previous year was 5715 with a standard deviation of 321. This year's average density measurement was 6095 with a standard deviation of 305. Assume that the variances are equal. With 95% confidence, test to see if the density has increased by more than 200 organisms per square meter.
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