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7.05 In an experiment at Virginia Tech, 20 northern oak seedlings were exposed to a fungus. Half of the seedlings received 368 ppm of nitrogen (treatment) during planting, and the other half received no nitrogen (control). The stem weights in grams, at the end of 140 days were recorded as follows: Treatment .32 .53 .28 .37 .47 .43 .36 .42 .38 .43 Control .26 .43 .47 .49 .52 .75 .79 .86 .62 .46 Construct a 95% confidence interval for the difference in the mean stem weights between the treatment and control groups. Assume that the under- lying populations are normally distributed with equal variances.

7.05 In an experiment at Virginia Tech, 20 northern oak seedlings were exposed to a fungus. Half of the seedlings received 368 ppm of nitrogen (treatment) during planting, and the other half received no nitrogen (control). The stem weights in grams, at the end of 140 days were recorded as follows: Treatment .32 .53 .28 .37 .47 .43 .36 .42 .38 .43 Control .26 .43 .47 .49 .52 .75 .79 .86 .62 .46 Construct a 95% confidence interval for the difference in the mean stem weights between the treatment and control groups. Assume that the under- lying populations are normally distributed with equal variances.

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 31E
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7.05 In an experiment at Virginia Tech, 20 northern oak seedlings were exposed to a fungus. Half of the seedlings received 368 ppm of nitrogen (treatment) during planting, and the other half received no nitrogen (control). The stem weights in grams, at the end of 140 days were recorded as follows: Treat ment | .32 .53 .28 .37 .47 .43 .36 .42 .38 .43 Control .26 .43 .47 .49 .52 .75 .79 .86 .62 .46 Construct a 95% confidence interval for the difference in the mean stem weights between the treatment and control groups. Assume that the under- lying populations are normally distributed with equal variances.
Transcribed Image Text:7.05 In an experiment at Virginia Tech, 20 northern oak seedlings were exposed to a fungus. Half of the seedlings received 368 ppm of nitrogen (treatment) during planting, and the other half received no nitrogen (control). The stem weights in grams, at the end of 140 days were recorded as follows: Treat ment | .32 .53 .28 .37 .47 .43 .36 .42 .38 .43 Control .26 .43 .47 .49 .52 .75 .79 .86 .62 .46 Construct a 95% confidence interval for the difference in the mean stem weights between the treatment and control groups. Assume that the under- lying populations are normally distributed with equal variances.
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