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A weed treatment prevents weeds growing for a mean of 70 days in areas to which it is applied. A new chemical is added to the treatment. The new treatment is applied to a random sample of 100 different areas and the number of days, x, for which the new treatment prevents weeds growing is recorded. The results are summarised below. Ex= 7060 and Ex² = 499000 Test whether the mean number of days for which the weed treatment prevents weeds growing has increased from 70 days, using the 1% level of significance.

A weed treatment prevents weeds growing for a mean of 70 days in areas to which it is applied. A new chemical is added to the treatment. The new treatment is applied to a random sample of 100 different areas and the number of days, x, for which the new treatment prevents weeds growing is recorded. The results are summarised below. Ex= 7060 and Ex² = 499000 Test whether the mean number of days for which the weed treatment prevents weeds growing has increased from 70 days, using the 1% level of significance.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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 13PPS
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A weed treatment prevents weeds growing for a mean of 70 days in areas to which it is applied. A new chemical is added to the treatment. The new treatment is applied to a random sample of 100 different areas and the number of days, x, for which the new treatment prevents weeds growing is recorded. The results are summarised below. [x = 7060 and Ex² = 499000 Test whether the mean number of days for which the weed treatment prevents weeds growing has increased from 70 days, using the 1% level of significance.
Transcribed Image Text:A weed treatment prevents weeds growing for a mean of 70 days in areas to which it is applied. A new chemical is added to the treatment. The new treatment is applied to a random sample of 100 different areas and the number of days, x, for which the new treatment prevents weeds growing is recorded. The results are summarised below. [x = 7060 and Ex² = 499000 Test whether the mean number of days for which the weed treatment prevents weeds growing has increased from 70 days, using the 1% level of significance.
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