Field 1 2 3 4 5 6 7 8 9

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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6.44 An entomologist is investigating which of two fumigants, F1 or F2, is more effective in
controlling
parasities in tobacco plants. To compare the fumigants, nine fields of differing
soil characteristics, drainage, and amount of wind shield were planted with tobacco. Each
field was then divided into two plots of equal area. Fumigant F1 was randomly assigned to
one plot in each field and F2 to the other plot. Fifty plants were randomly selected from each
field, 25 from each plot, and the numbers of parasites were counted. The data are in the following
table.
Field 1 2 3 4 5 6 7 8 9
Fumigant F1 77 40 11 31 28 50 53 26 33
Fumigant F2 76 38 10 29 27 48 51 24 32
a. What are the populations of interest?
b. Do the data provide sufficient evidence to indicate a difference in the mean
levels of parasites
for the two fumigants? Use a 5 .10. Report the p-value for the
experimental data.
c. Estimate the size of the difference in the mean numbers of parasites between the
two fumigants using a 90% confidence interval.

6.44 An entomologist is investigating which of two fumigants, F1 or F2, is more effective in
controlling parasities in tobacco plants. To compare the fumigants, nine fields of differing
soil characteristics, drainage, and amount of wind shield were planted with tobacco. Each
field was then divided into two plots of equal area. Fumigant Fi was randomly assigned to
one plot in each field and F2 to the other plot. Fifty plants were randomly selected from each
field, 25 from each plot, and the numbers of parasites were counted. The data are in the fol-
lowing table.
Field
2
3
4
5
6
7
8
9
Fumigant F1
77
40
11
31
28
50
53
26
33
Fumigant F2
76
38
10
29
27
48
51
24
32
a. What are the populations of interest?
b. Do the data provide sufficient evidence to indicate a difference in the mean
levels of parasites for the two fumigants? Use a - .10. Report the p-value for the
experimental data.
C. Estimate the size of the difference in the mean numbers of parasites between the
two fumigants using a 90% confidence interval.
Transcribed Image Text:6.44 An entomologist is investigating which of two fumigants, F1 or F2, is more effective in controlling parasities in tobacco plants. To compare the fumigants, nine fields of differing soil characteristics, drainage, and amount of wind shield were planted with tobacco. Each field was then divided into two plots of equal area. Fumigant Fi was randomly assigned to one plot in each field and F2 to the other plot. Fifty plants were randomly selected from each field, 25 from each plot, and the numbers of parasites were counted. The data are in the fol- lowing table. Field 2 3 4 5 6 7 8 9 Fumigant F1 77 40 11 31 28 50 53 26 33 Fumigant F2 76 38 10 29 27 48 51 24 32 a. What are the populations of interest? b. Do the data provide sufficient evidence to indicate a difference in the mean levels of parasites for the two fumigants? Use a - .10. Report the p-value for the experimental data. C. Estimate the size of the difference in the mean numbers of parasites between the two fumigants using a 90% confidence interval.
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