Some researchers have conjectured that stem-pitting disease in peach tree seedlings controlled with weed and soll treatment. An experiment was conducted to compare peach tree seedling growth with sol and weeds treated with one of two herbicides. In a field containing 20 seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide A The remaining 10 seedlings were to recelve Herbicide B. Soil and weeds for each seedling were treated with the appropriate herbicide and at the end of the study period the height (in centimeters) was recorded for each seedling. A box plot of each data set showed no indication of non Normality. The following results were obtained: lom) icm) Herbicide A Herbicide B 945 10 109.1

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Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be
controlled with weed and sol treatment. An experiment was conducted to compare peach tree
seedling growth with sol and weeds treated with one of two herbicides. In a field containing 20
seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide
A The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling were
treated with the appropriate herbicide and at the end of the study period the height (in
centimeters) was recorded for each seedling. A box plot of each data set showed no indication of
non-Normality. The following results were obtained:
x (cm)
s (cm)
Herbicide A
945
10
Herbicide B
109.1
A 95% confidence interval for ug - Ha is given by which of the following expressions? (Use the
conservative value for degrees of freedom)
(109 1-94 5) t1 96
(109 1-94 5) + 2 263
109 1- 94 5)2196, .
(109 1- 945)2262,
(109 1- 94 5)
Transcribed Image Text:Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and sol treatment. An experiment was conducted to compare peach tree seedling growth with sol and weeds treated with one of two herbicides. In a field containing 20 seedlings, 10 were randomly selected from throughout the field and assigned to receive Herbicide A The remaining 10 seedlings were to receive Herbicide B. Soil and weeds for each seedling were treated with the appropriate herbicide and at the end of the study period the height (in centimeters) was recorded for each seedling. A box plot of each data set showed no indication of non-Normality. The following results were obtained: x (cm) s (cm) Herbicide A 945 10 Herbicide B 109.1 A 95% confidence interval for ug - Ha is given by which of the following expressions? (Use the conservative value for degrees of freedom) (109 1-94 5) t1 96 (109 1-94 5) + 2 263 109 1- 94 5)2196, . (109 1- 945)2262, (109 1- 94 5)
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